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Rainwater Design | Roof | Polyvinyl Chloride
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PAGE 2-3 4-5 6-7 8 9-10 SECTION/MODULE 0.00 0.00 0.01 0.01 1.00 HUNTER PLASTICS LIMITED APPROVALS - HUNTER RAINWATER SYSTEMS PROPERTIES & PERFORMANCE FEATURES, DESCRIPTION, PERFORMANCE PHYSICAL & MECHANICAL PROPERTIES Mechanical Snow loading Thermal movement Chemical properties Durability Flow characteristics Effect of wind Storage Handling Lubricants Maintenance Further information COMPOSITION Product dimensions Finish DESIGN GUIDE Application Criteria Effective maximum roof area Calculation of area to be drained Selecting the system Design notes COSHH Site precautions Hunter & CDM Table 1 (Adjustment for angles in gutter when calculating effective roof areas) Worked sample Gutter profile selection and rainwater outlet siting Compatibility table HALF ROUND PROFILES SQUARFLO PROFILE 125 PROFILE REGENCY PROFILE OGEE PROFILE STORMFLO PROFILE (HIGH CAPACITY) UNIFIT OUTLET HIGHFLO PROFILE (HIGH CAPACITY) INSTALLATION PROCEDURES/DETAILS Position outlet Establish fall Fix support & joint bracket Buildings with fascias Fixing corner angles Installing gutter and downpipes Gutter positioning Fault finding tips Gutter to gutter connections Rise & fall brackets Rainwater hopper heads Downpipe installation Downpipe offsets Downpipe brackets Connecting downpipes to drain (Surface water only) Connecting downpipes to gullies (Combined systems) Repair and replacement Connecting PVC-U Half Round/Squareflo to c.i. Half Round gutter Connecting to spigot Connecting PVC-U half round to c.i. Ogee gutter Pipe cutting, general Maintenance and safety HANDLING AND STORAGE Handling Storage Loose pipe Spigot and socketed pipe Fittings Safety tips FLAT ROOF OUTLETS Introduction Roof outlet drainage data Installation procedures Roof outlet profiles Typical site work detail FIXING BRACKETS FABRICATION SERVICE
10 11-15 12
13 14 15 16-22 23-27 28-31 32-35 36-40 41-44 45 46-49 50-55 3.00 4.00 5.00 6.00 7.00 8.00 8.00 9.00 10.00
62-62 63-64
Hunter Plastics has earned its place as a UK leader in the above and below ground plastics gravity drainage market by listening to what its customers say they need, then using all of its resources to fulfil those needs. This is not just about product, although Hunters expertise in plastics technology and processing has resulted in one of the most innovative and versatile product ranges on the market today. Our Philosophy More importantly, customers needs are about service. Thats why it has always been Hunters strategy to provide the best possible customer care, reliable product availability and delivery, with committed professional staff, whose skills are continually developed through initiatives, such as Investors in People, competitive pricing and knowledgeable sales and marketing backup locally, regionally, nationally and internationally. Our Approach Hunters technique is to build fully supportive working relationships with companies who share its views that well-planned, professionally executed customer care programmes assure long term profitable growth. Is Hunter giving itself a pat on the back? No. The real winners here are Hunters customers who have direct, exclusive access to unrivalled purchasing power, world-wise business people who never forget the importance of servicing local needs, and exclusive products whose performance quality is already well proven the world over.
We make it our business... to be committed to yours
Hunter commitments:
Thorough quality control at every level
Accurate on-time delivery service
Innovative designs, offering unique product opportunities
Comprehensive sales and after-sales support
0.00 APPROVALS
Hunter Plastics Rainwater Systems are suitable for most applications and types of building, including domestic, commercial and industrial. There are complementary Soil and Waste, Underground Drainage and Sewer Systems to provide a complete solution for all drainage requirements.
British Standards BS EN ISO 9002:1994 Quality Systems. Model for Quality Assurance in Production, Installation and Servicing. Registration No: FM1101. BS EN 607:1996 Eaves gutters and fittings made of PVCu. Definitions, requirements and testing. Licence No: KM54350. BS EN 1462: 1997 Gutter brackets. Classification, requirements and testing. Licence No: KM54353. BS EN 12200: 2000 Rainwater piping systems. Specification for pipes, fittings and the system. Licence No: KM58454. BS 2494:1990 Specification for elastomeric seals. Requirements for joints in pipework and pipelines. Types D - Drainage T - Above ground Thermoplastic Rubber.
BS EN 681:1996 Elastomeric seals. Material requirements for pipe joint seals used in water and drainage applications. Part 1. Vulcanized rubber Part 2. Thermoplastic elastomers. BS 4255: Part 1:1986 Specification for Non-cellular gaskets for buildings. BS 4660: 2000 Ancillary fittings of nominal sizes 110mm - 160mm below ground gravity drainage and sewerage. Licence No: KM57147. BS EN 1401-1: 1989 Plastic Pipe Systems for non-pressure underground (Hunters 110mm - 160mm standard pipe fittings). Licence No: KM05317. BS 4514:1983 Unplasticised PVC, soil and ventilating pipes, fittings and accessories. Licence No: KM05317. BS EN 12056-3 Gravity drainage systems inside buildings. Part 3: Roof drainage layout and calculations. Load Bearing All of the Hunter gutter brackets have been subjected to simulated load bearing tests in accordance with clause 6 of BS EN 1462: 1997. In areas where particularly high snow falls and severe icing might be expected BS EN 1462: 1997 recommend that heavy duty brackets (load bearing class H) should be fitted. This precaution should also be considered wherever sliding snow might cause damage or injury to structures or persons below. Support brackets should be fixed at as specified in section 1.02 Performance and Properties. Building regulations approved document H 3
0.01 PROPERTIES & PERFORMANCE
CHEMICAL RESISTANCE Polluted industrial atmospheres will not affect Hunters Rainwater Systems. PVC and polypropylene are rot and vermin proof and resistant to most commonly occurring chemicals, so will not be affected by domestic effluents. Notable exceptions however are solvents, including those incorporated in most timber preservatives. Hunter PVCu Rainwater systems are self-coloured and corrosion resistant, the material therefore does not require painting. However, if painting is required, a paint specific for use with PVC should be used. Standard gloss paint may be used if; The PVC surface has weathered for some time The gloss surface of gutter is sanded down Wood fascias treated with timber preservative must be allowed to dry before fixing Hunter PVCu eaves gutters. It is essential that fascia boards treated with creosote are left for at least 48 hours to dry before fixing commences FIRE PERFORMANCE PVC in almost all forms has superior fire performance to most plastic materials: this makes it a suitable choice for indoor applications. In comparison Polypropylene has poor fire performance. Interior applications of plastic pipes may require protection in compliance with Building Regulations.
STRUCTURAL AND MECHANICAL PROPERTIES Hunter Plastics gutters and downpipes are highly resistant to impact breakage and easily support ladder weights. THERMAL The coefficient of linear thermal expansion of PVCu is 5 x 10-5 mm/m/ C and all Hunter Rainwater systems have been designed to take this into account. It is important that resultant movement be provided for during installation. COMPATIBILITY The Surefit system will connect to most 112 mm nominal half round PVCu gutter systems without the need for any special adaptor. Please refer to the Compatibility Chart. Hunter PVCu downpipes will connect to most other manufacturers 68 mm circular and 65 mm square rainwater pipes and are suitable for connection to most types of drain. COLOUR FASTNESS Hunters Rainwater System is fully tested to BS EN 607, BS EN 12200 artificially ageing the product to method A of ISO/DIS 4892-2 and measuring the colour fastness to EN 20105-402. MATERIAL PROPERTIES Material properties determine the correct selection of a system. The main materials used are PVCu, modified PVCu and polypropylene. Polyethylene (HDPE) is used in the manufacture of snap caps to retain the ring seals. Unplasticised polyvinyl chloride, PVCu, is a very versatile material: many processing methods can be used, it can be coloured, is lightweight, and has good chemical resistance, fire performance and weatherability. PVCu can be modified to increase its resistance to higher temperature discharges. Polypropylene has excellent chemical resistance and can tolerate high temperatures. SERVICE TEMPERATURE PVCu has a softening point In excess of 70C, and PVCu soil stacks can cope with short intermittent discharges with temperatures up to 90C Modified unplasticised polyvinyl chloride, MuPVC, has a softening point above 90C so, in addition to the normal properties of PVCu, it can also cope with higher temperature discharges over prolonged periods. The higher softening point of polypropylene, above 140C, means it can cope with high temperature discharges, such as boiling water, and it is the most appropriate material for the manufacture of traps. UV LIGHT RESISTANCE While polypropylene has good chemical resistance, resistance to UV light is poor. Exterior applications require protection using paint or closures. PVCu can be formulated to give excellent resistance to UV light, and so is suitable for exterior uses, requiring no additional protection. TIMBER PRESERVATIVES Before any component is fixed to a timber surface treated with wood preservative, the preservative must be dried thoroughly. The solvent content of wet preservatives can attack and embrittle plastic materials. Allow at least 48 hours for drying.
BS EN 607 Requirements Wall Thickness Gutter BS EN 607 Min Hunter Downpipe BS EN 12200 Hunter Min 1.8 1.80mm
Impact Resistant Test BS EN 12200 Hunter Max 10% Failure No Failures
Max 2.3 2.05mm
Dead Weight Test of Gutter Brackets Heavy Duty 76kg Standard Duty 50kg Below 80mm opening - no testing BS EN 1462 Max 5mm deflection after test Hunter Max 3mm achieved on tests Leak Test BS EN 607 Hunter No leaks No leaks
Moulded Fittings BS EN 607 Min Hunter
Materials PVC-u including no re-worked material Colour Fastness - Rainwater and Soil products All products are artificially aged in accordance with Method A. ISO/DIS 4892-2 and tested in accordance with EN 20105-402 for colour fastness Vicat Softening Temperature BS EN 607/12200 Min 75C Hunter White average Grey average Brown average Black average
Further Properties Specific Gravity 1.35-1.45 Co-efficient of Linear Expansion 7x10-5/mlC Water Absorption Negligible Oxygen Index 42% Chemical Resistance The material is virtually unaffected by solutions of inorganic acids, alkalis and salt and is resistant to many organic chemicals. It may be softened by some organic materials such as Ketones and aromatic compounds. It will not corrode. Fire Resistance Materials used in Hunter Rainwater Systems are self extinguishing
82.8C 84.8C 82.5C 83.1C
Heat Reversion of Gutters BS EN 607 Max 3.0% Hunter Avge 2.0% (max 2.8%) Heat Reversion of Downpipes BS EN 12200 Max 3.0% Hunter Avge 2.0% (max 2.5%)
Features, Description & Performance
The Hunter range of plastic rainwater systems offers the specifier products which are the result of over 30 years of innovative design and research. They reflect the major advances in rainwater system technology pioneered by the Company in its production of high quality PVC-U products for the building industry.
A team of qualified design engineers are available for free consultation on any aspect of plumbing and drainage installations. Specific questions or requirements concerning Hunter products can be met by contacting Hunter Plastics Limited at the address below or by Fax to Hunter Technical Design Services on (020) 8854 7446.
Hunter rainwater systems are available throughout the UK from reputable builders merchants and other points of sale. A list of stockists is available on request.
Technical publications are available upon request to the Commercial Department. Phone: (020) 8855 9851.
Hunter offers a complete estimating, packing and shipping service to facilitate export orders with local assistance in many countries.
Hunter rainwater systems are ideal for many specialist industrial, domestic and conservatory applications. For further details, call Hunter Technical Design Services on (020) 855 9851 or Fax on (020) 8854 7446.
Hunter has the expertise and the facilities to design and fabricate non-standard components to meet the needs of special technical or architectural design requirements. Modifications to standard products are available for all the Hunter systems. Delivery times and price will depend on the complexity of the design and the quantity required.
All Hunter products are manufactured using a quality management system approved by BSI and conforming to BS EN IS0 9002: 1994. Kitemarked product conforms to applicable BS EN standard. PATENT NUMBERS Gutter seal (as used in the 112 mm Surefit components) GB Pat. No. 2281323 Mini clip gutter system - GB Pat. No. 2282160
BS EN 607 BS EN 12200 BS EN 1462
All Hunter products are manufactured using a quality management system approved by BSI and conforming to BS EN IS0 9000. Where applicable, products are kitemarked.
1.01 COMPOSITION Product dimensions Finish 1.02 PERFORMANCE AND PROPERTIES Mechanical Snow loading Thermal movement Chemical properties Durability Flow Characteristics Effect of wind Storage Handling Lubricants Maintenance Further information
Description 1.01 COMPOSITION
CHEMICAL PROPERTIES PVC-U has good resistance to most solutions of acids, alkalis and salts, and to solvents miscible with water. However, it is not resistant to aromatic and chlorinated hydrocarbons. The incorporation of high quality pigments in Hunter products affords outstanding durability and help to prevent degradation by air pollution and U.V. light. Polluted atmospheres will not affect Hunter rainwater systems. It is essential that fascia boards treated with preservatives such as creosote are left for at least 48 hours to dry before fixing commences. DURABILITY Given proper maintenance, Hunter rainwater systems have a life expectancy of over 50 years. FLOW CHARACTERISTICS The unique ribbed profile of Hunter gutters and the computerdesigned fastflo outlets impart excellent flow characteristics to the systems. More detailed information and calculation methods are given on the following pages. EFFECT OF WIND To prevent the wind from blowing rainwater behind the gutter and creating potential water damage to property, ensure that roofing felt is fitted and extended to below the gutters' rear edge. STORAGE Block bundles - Store block bundles, loose gutter or pipe on a reasonably flat surface free from sharp projections. Block bundles can be stored up to three high without extra side supports or bearers. In addition, block bundles will remain free standing when cut. Care should be taken when gutter or pipe straps are removed from bundles as the straps are under considerable tension and may flail when cut. Do not store any wrapped products in direct sunlight. HANDLING Always be careful to avoid damage when handling gutter or pipe. Excessive scratching or scoring of gutter and pipe not only affects the appearance but can also affect the joint sealing. Cold weather affects the impact strength of most plastics so extra care should be taken when handling gutter and pipe in wintry conditions. Load and unload loose gutter or pipe by hand. When loose pipes have been transported one inside the other, always remove the inner pipe first. (For full details on Handling and Storage - please refer to section 8.00). LUBRICANTS The use of silicone lubricant on Hunter rainwater systems will assist assembly and prevent juddering noises caused by gutter movement across dry joints. Never use washing up liquid or similar substances to lubricate gutter seals. MAINTENANCE Regularly clearing gutters of leaves, silt or other debris will extend the life of the gutters and ensure continuing efficient performance. FURTHER INFORMATION For further information on any of the above, please contact Hunter Technical Design Services on (020) 8855 9851 or Fax on (020) 8854 7446.
All gutters, pipes and fittings, unless otherwise specified, are manufactured in unplasticised polyvinyl chloride (PVC-U). All seals used within Hunter fittings are produced in a rubber material to BS 2494 Type D: 1990 or manufactured in accordance with relevant British Standards. The major advantages of PVC-U rainwater systems are:
q Minimal maintenance q Self-coloured - no painting required q Does not support combustion q Economical and easy to fix q Lightweight and easy to handle q Corrosion free
Other materials used are as follows Joint seals: Synthetic rubber Rise and fall brackets: Galvanised steel PRODUCT DIMENSIONS Refer to drawings and tables on pages 9 to 23. FINISH All PVC-U products in the system have a smooth, easy-to-clean surface finish. COLOURS
SYSTEM WHITE GREY VAN DYKE BLACK BROWN
1.02 PERFORMANCE AND PROPERTIES
MECHANICAL PVC-U has good flexural and tensile strength characteristics, but, as with all types of gutter, ladders should be held off gutters and brackets to avoid damage. SNOW LOADING All systems have been extensively tested to withstand heavy snow loads in accordance with BS EN 1462 & BS EN 12056-3, however, in areas subject to heavy snow fall it is recommended that Hunter Heavy Duty Brackets are used. When fixing beneath a steeply pitched roof or in areas subject to heavy snow, it is also recommended that fixing centres of brackets are reduced to 750 mm 500 mm for Ogee gutters and 600 mm for Stormflo. Consideration may also be given to fitting snow guards to eaves of pitched roofs to prevent sliding snow or ice causing damage to persons or structures below (as recommended in BS EN 12056-3). THERMAL MOVEMENT Gutter joints have been designed to accommodate normal thermal movement without leakage, distortion or displacement from fittings. Particular care is necessary to ensure that gutters are assembled to the insertion lines engraved inside each fitting. The coefficient of thermal expansion of PVC-U is 0.05 mm/metre/oC.
2.00 APPLICATION CRITERIA Effective maximum roof area Calculation of area to be drained Selecting the system Design notes COSHH Site precautions Hunter and CDM Table 1: Gutter Profile/Flow Capacity (Adjustment for angles in gutter when calculating effective roof areas) Worked example Gutter profile selection and rainwater outlet siting Compatibility Table
SELECTING THE SYSTEM Once the following facts have been determined, a) The effective roof area (or areas) b) The number and position of outlets c) The angles and their distances from outlets, The selection of a gutter system can now be approached. To select a guttering system to suit the design criteria refer to drainage data in Table 1. DESIGN NOTES As can be seen from Table 1 on page 11, the gutter flow capacity and the area of roof which can be drained with a given number of outlets will increase if the gutter is laid to a fall. This is also the case if the downpipe is positioned centrally to the gutter. If it is possible therefore to incorporate these features in the layout, they will lead to a more economical system. The recommended maximum fall is 1:350. This will considerably reduce the chance of silting and blocking of outlets by debris, leaves, etc. (Plastic gutters can be laid level). For pitched roofs without eaves, the Hunter rise and fall brackets may be used, which have threaded adjustable stems to provide a fall in the gutter (see installation details at the end of this brochure). NOTE: It is important that all products in this brochure are correctly installed in accordance with BS EN 12056-3 Code of Practice for drainage of roofs and paved areas. Reference to BS EN 752-1996 drain and sewer systems outside buildings are also recommended.
In order to design an effective and efficient system and to select the Hunter rainwater system suitable for the application, the specifier should follow the following procedures: 1. Determine the rainwater outlet positions with regard to the underground drainage system. 2. Calculate the effective maximum roof area (see below) to be drained. 3. Note the distance of any gutter angle from the nearest outlet.
EFFECTIVE MAX ROOF AREA (ALLOWANCE FOR WIND) This can be calculated by using the following formula (see diagram below): (W + H ) x L (length of roof) = area in m2
W = Horizontal span of slope H = Height of roof pitch L = Length of roof
The above formula is in accordance with BS EN 12056-3:2000
Note: For flat roofs, the roof area should be regarded as the total plan area. If the pitched roof is complex, ie has different pitches or spans, then each part should be calculated separately. An alternative acceptable method is described in the Building Regulations, Approved Document H, which is reproduced in the table below: CALCULATION OF AREA TO BE DRAINED
Type of surface 1. flat roof 2. pitched roof at 30o pitched roof at 45o pitched roof at 60o 3. pitched roof over 70o or any wall Design area (m2) plan area of relevant portion plan area of portion x 1.29 plan area of portion x 1.50 plan area of portion x 1.87 elevational area x 0.5
COSHH The Control of Substances Hazardous to Health Regulations should be referred to where applicable. Information on pertinent COSHH Regulations is available from the Commercial Department on request. SITE PRECAUTIONS The relevant regulations detailed in the Health and Safety at Work Act 1974 must be adhered to on site. When using a ladder, make sure it is securely fixed at the top and that the bottom is on level ground. If the ground is smooth or slippery, place a bag filled with sand or soil at the foot of the ladder and take care not to over reach. Take special care when removing old cast iron systems, as they can be extremely heavy and therefore dangerous.
HUNTER AND CDM
Note: To calculate flow in litres/second for 75 mm/hour intensity, multiply effective roof area m2 by 0.0208.
Specifiers have an obligation under the Construction (Design and Management) Regulations to identify and evaluate the health and safety implications of the products and systems their designs require. Hunter products can be specified on the basis that they do not present a risk to users at any stage of the construction process.
PROFILE-BASED SELECTION: Table 1 - GUTTER PROFILE/FLOW CAPACITY Check the performance of the chosen gutter system against your design criteria for roof area and flow rates, using the table below.
DOWNPIPE AT ONE END GUTTER FIXED LEVEL GUTTER FIXED AT 1:350 FALL
GUTTER FLOW (Litres/sec) 76 mm 112 mm 0.5 0.9 1.6 68 mm downpipe 82 mm downpipe 2.1 2.2 2.1 1.1 2.8 110mm downpipe 160mm downpipe 5.9 6.6
ROOF AREA (m2) 24 43 77 101 106 101 53 136 282 318
GUTTER FLOW (Litres/sec) 0.6 1.3 2.0 2.4 2.5 2.3 1.5 2.9 5.9 6.7
ROOF AREA (m2) 29 62 96 115 120 110 72 137 284 320
DOWNPIPE AT CENTRE GUTTER FIXED LEVELGUTTER FIXED AT 1:350 FALL
GUTTER FLOW (Litres/sec) 76 mm 112 mm 0.7 1.8 3.2 68 mm downpipe 82 mm downpipe 3.8 4.0 4.2 2.4 5.4 110mm downpipe 160mm downpipe 11.1 12.5
ROOF AREA (m2) 34 86 154 182 191 202 115 258 534 601
GUTTER FLOW (Litres/sec) 0.8 2.6 3.8 4.6 4.9 4.7 3.0 6.0 12.4 14.0
ROOF AREA (m2) 38 125 182 221 232 226 144 289 598 673
ADJUSTMENT FOR ANGLES IN GUTTER WHEN CALCULATING EFFECTIVE ROOF AREAS
The calculated effective roof area figures are affected by angles in the gutter as follows:
If a length of eaves gutter includes an angle, the flow in the gutter will be impeded and its capacity reduced by 15%. Where an angle occurs in a length of gutter served by two outlets, the reduction factor of 0.85 should only be applied to that part of the gutter in which the angle obstructs the flow.
The figures in the table are based on the average U.K rainfall intensity of 75 mm/hr, roof pitch not exceeding 50o and gutters running full. Refer to BS EN 12056-3 for detailed information on roof drainage.
Note: The highlighted figures on the top table relate to the worked example as follows.
Figure 1 shows the roof plan of a dwelling with a 30o pitched roof.
From figure 1 to the conclusion as denoted in figure 2 the following design criteria have been used. By using the formula: (W + H) x L 2 The effective roof area can be calculated.
CALCULATION SEQUENCE 2 R1: (4 + 2.3) x 16 = 82.4m 2 2 R2: (4 + 2.3) x 10 = 51.5m 2 2 R3: (4 + 2.3) x 10 = 51.5m 2 2 R4: (4 + 2.3) x 8 = 41.2m 2 Figure 2 shows feasible outlet positions, gutter installation, roof area, and possible drainage layout. GENERAL DESIGN NOTES 1. Roofs R2, R3 and R4 are trapezoid in shape, to calculate the roof area without getting into complicated mathematics it would be apt to divide the roof into simple shaped, such as rectangles and triangles. 2. If elevations are not available but the roof pitch is known there is a simple method of finding the height of roof pitch (H). METHOD Angle tangent x horizontal span of slope will give you height of roof pitch (H). In our worked example we have a 30pitched roof ( tangent = 0.5774). 0.5774 x 4 = 2.3m/height of roof pitch. 3. To calculate flow in litres/second in eaves gutters 2 multiply effective roof area m by a rainfall intensity of 0.0210. EFFECT OF ANGLES If a length of eaves gutter includes an angle, the flow in the gutter will be impeded and its capacity reduced by 15%. Where an angle occurs in a length of gutter served by two outlets, the reduction factor of 0.85 should only be applied to that part of the gutter in which the angle obstructs the flow.
NB. It is considered good practice to locate outlets as near to valleys as possible.
GUTTER PROFILE SELECTION AND RAINWATER OUTLET SITING
3. continued It will therefore be necessary to fix the gutter to a fall of 1:350 which will then give us 96m2, meeting the requirement of 82.4m2 using one outlet. 4. Roof 3 has an effective roof area of 51.5m2, consulting Table 1 it will be found that by fixing the gutter level and discharging to one outlet at one end the maximum roof area that can be drained will be 77m2. Please note that the outlet has been positioned at the valley end of the gutter. CONCLUSION Hunters Squareflo Rainwater System is suitable for our example design criteria but it is possible to select different gutter profiles with the adjustments to the number and positioning of outlets together with gutter falls.
1. Assume that the Hunter Squareflo profile has been selected. 2. The maximum effective roof area to be drained is R2 + R4 (51.5 + 41.2) = 92.7m2 Consulting Table 1 it will be found that a gutter fixed level using one end outlet would give a roof area of 96m2, but as we have a 90 angle at the valley we need to apply the 0.85 reduction factor, making the gutter capacity 84.15m2. By positioning the outlet near to the valley and fixing the gutter it will drain 154m2 x 0.85 = 130.9m2. 3. Roof 1 has an effective roof area of 82.4m2 to be drained, consulting Table 1 it will be found that by fixing the gutter level as for R2 and R4 we can only achieve a roof drainage area of 77m2.
Half Round 76mm Half Round 112mm Squareflo 125 Regency Ogee Highflo Stormflo
Hunter Half Round, Squareflo and 125 PVC-U Rainwater systems are compatible with many other manufacturers systems and with cast iron and aluminium profiles. The table alongside indicates the most commonly found manufacturers. For further information, please contact Hunter Technical Department.
Hepworth Marley Osma Polypipe Terrain Brett
*Using adaptor seal - R600
Integral, pivoted clips allow fast, simple, 'snaplock' assembly and disassembly of gutter. Fixing wings allow easy fast fixing, whether using hand or power tools. Integral,recessed , pre-lubricated EPDM seal is robust and watertight.
3.00 HALF ROUND GUTTER
Efficient flow capacity Surefit clipping system for fast installation on 112 mm Simple to install Ideal for new and refurbishment applications Compatible with most existing metal or plastic systems *Surefit is available for the 112 mm system Profile Dimensions (mm) Domestic housing Greenhouses, sheds etc.
NB: Downpipe supports fixed at 1.8m maximum
NOTE: Any reference to Surefit Halfround is relevant to 112mm only.
Colours Black Grey Van Dyke Brown White
Colour range unless otherwise stated
RAINWATER SYSTEM 3.01 Gutter
Nominal A size mm 76 76 112 112 112 B 34 52
Code R513 R511 R512
3.04 Stopend external
Nominal size mm 76 112 A 32 37 Code R34 R13 (shown)
Length m 2 2 4
3.05 Angles 3.02 Joint bracket
Nominal A size mm 76 65 112 105 B 15 20 Code R37 R8 (shown)
Nominal size mm 76 112 A 65 86 B 105 151 C 127 194 Code R29 R5 (shown)
N.B. Dimension B is gutter insert to gutter insert N.B. Dimension A is gutter insert to centreline
3.03 Outlets Running outlet
Nominal size mm 76 112
R11 (shown)
B 167 240 C 26 41 D 100 132 E 108 155 Code R32 R11 Nominal A size mm 112 43 B 68 Code R6
A 76 260
N.B. Dimension A is the depth of gutter insertion (112 mm only). 76 mm version not available in white.
Nominal A size mm 76 24 112 43
N.B. Dimension E is gutter insert to gutter insert
B 32 67
Code R31 R7 (shown)
Nominal size mm 76 112 A 38 64 B 100 131 C 26 40 D 92 166 E Code
N.B. Dimension A is the depth of gutter insertion (112 mm only) 76 mm not available in white
122 R33 210 R12 (shown)
A full fabrication service is available for non-standard angles. Support bracket is required at max 150 mm from face of angle (112 mm only).
3.06 Gutter union
Nominal size mm 112
N.B. Dimension E is gutter insert to end face of stopend The 112 mm stopend outlet is fixed to fascia using a support bracket
Code R398
N.B. Dimension B is gutter insert to gutter insert. Use with Support Bracket
Nominal A size mm 76 83 112 124 B 44 64 C 45 76
3.10 Connectors to other systems Half round to cast iron ogee
Nominal size mm 112 112 Hand RH LH Code R461 R462 (shown)
RAINWATER SYSTEM HALF ROUND 3.07 Support bracket
Code R36 R10 (shown)
Double screw fixing bracket
Nominal size mm 112 Code R25
Nut and bolt supplied. N.B: Left hand shown. Depth of gutter insertion = 30 mm. Joint to be made with non-bitumastic based compound. Available in in black only
N.B. Dimension B is to centre line of gutter
3.11 Universal fixing brackets Variable rise and fall bracket Stake
size mm A B C 63 63 D 139 139 Code R26 R27
3.08 Galvanised rise and fall bracket
Nominal size mm 112 112 Code R9 R18
229 37 330 37
PVC-U with galvanised stake. Supplied with fixing nut and bolt. Colour black. Order gutter brackets separately. (UK patent no. 2176824).
Wedge spacer 3.09 Connectors to other systems Half round to cast iron half round
Nominal size mm 112 Code R459 (for L/H or R/H connection) Code R2
Available in grey only. For use with Half Round R8, R10, R25 and Squareflo R378, R379 and R395. For 221 2 pitched roofs.
Angle Code Side 30 R16 Top 30 R15
Galvanised Nut and bolt supplied. N.B: depth of gutter insertion = 30 mm. Will connect to outside of 4" cast iron gutter or inside of 412" Joint to be made with non-bitumastic based compound Supplied with wing nut and bolt Side R16 Top R15
Not suitable for 170mm system or 200mm Stormflo
Nominal size mm 50 68 68 68 68
3.15 Adaptors
Code R522 R518 R519 R520 R521
RAINWATER SYSTEM HALF ROUND 3.12 Pipe (plain ended)
External diameter A 50 68 68 68 68 Length m 2 2 2.5 4 5.5
Nominal size mm 65 Code R397
3.16 Brackets Single screw fixing
Nominal size mm 50 Code R39
Single screw fixing/snap fit
Nominal size mm 68 Code R19
3.13 Pipe connector
Nominal size mm 50 Code
Nominal size mm 68 Code R46
Socket / Spigot pipe connector
3.14 Gutter leaf guard
Nominal size mm 10 x 500 5 Metre pack Code R500
3.17 Drain leaf guard
Nominal size mm Code DS500
Suitable for 112mm Half Round and Squareflo - Black only
Accepts rainwater pipes up to 110mm diameter To cover drains up to 300mm wide x 265mm - Black only
RAINWATER SYSTEM 3.18 Bends 92 1/2 - 68 mm Nominal Code size mm 68 R577
HALF ROUND 3.21 Branches 112 1/2 - 68 mm
Nominal size mm 68 Code R22
Standard offset using 2 bends = 119 mm
3.19 Bends cont. 112
3.22 Shoe
Code R40 R20 Nominal A B size mm 50 25 40 68 35 45 C 70 101 Code R41 R21
offset 68/50 mm
A 26 28 B 22 42
Nominal size mm 50 68
Standard offset using 2 68 mm bends = 87 mm Standard offset using 2 50 mm bends = 75 mm
3.20 Adjustable offset
Nominal size mm 68 mm Offset projection 22-80 mm (Cut to suit) Code R24
RAINWATER SYSTEM 3.23 Hopper heads
Nominal Code size mm 50 R14 + R666 68 R14
HALF ROUND 3.26 Reducers 68 mm spigot/50 mm spigot
Nominal size mm 68 Code R666
N.B. spigot fits into 50 mm pipe
82 mm spigot/68 mm socket
Nominal size mm 82 Code R4
3.24 Access pipe
Nominal size mm 68 Code
3.27 Drain connector - external use only
R1 Nominal size mm 50, 65, 68 Code DS24
Mult rainwater adaptor (Flexible) Fts 110mm pipe or socket Available in black only Not available in white
3.28 Reducer
Nominal size mm 68
3.25 Drain connector to GVC socket
Nominal size mm 68 Code R23
110mm socket to 68mm socket Available in black only
For connection to GVC socket Available in black only
82mm spigot x 50mm socket Available in grey only 50
110mm spigot x 50mm socket Available in grey only
The Hunter Surefit system offers significantly reduced installation times and is integral to all Squareflo joint brackets, angles, outlets, and stopends. Simply snapping in the lengths of guttering ensures speedy, positive location at all joints saving time and money.
4.00 SQUAREFLO
Clean, angular profile Ideal for domestic
housing and conservatory applications Efficient flow capacity Ideal for new and refurbishment applications Simple to install
Using one-piece adjustable offsets (R399), or two offset bends (R390) a wide variety of constructions can be met.
Multi-positional outlet - R400
Black Grey Van Dyke Brown White A simple solution to create gutter outlets for awkward downpipe positions. Suits square or round pipework.
RAINWATER SYSTEM 4.01 Gutter
Nominal size mm 114 114 Length m 2 4
SQUAREFLO 4.05 Galvanised rise and fall bracket
Nominal size mm 114 Code R377
Code R516 R517
4.02 Joint bracket
Nominal size mm 114 Code R379
4.06 Angles 90
Nominal size mm 114 Code R383
N.B. Dimension 20mm is gutter insert to gutter insert
4.03 Support bracket Single screw fixing
Nominal size mm 114 Code R378
Depth of gutter insertion 42 mm. Dimension 144 mm is to gutter insertion point.
Nominal size mm 114 Code R374
Nominal size mm 114 Code R395
N.B. Dimension 42 mm is gutter insertion depth.
135 4.04 Stopend external/internal
Nominal size mm Code Nominal size mm 114 Code R375
114 R381
N.B. Dimension 42mm is gutter insertion depth A full fabrication service is available for non-standard angles.
RAINWATER SYSTEM Angles cont. 150
Nominal size mm 114 Code R370
SQUAREFLO 4.09 Connectors to other systems Square to cast iron half round
Nominal size mm 114 Hand L/H Code R387
(Also suitable to connect to PVC-U half round gutter) A full fabrication service is available for non-standard angles N.B: Depth of gutter insertion, 30 mm Nut and bolt supplied
4.07 Outlets Running outlet
Nominal size mm 114 Code R376
4.10 Pipe Plain Ended
Nominal size mm 65 Length m 2.5 4 5.5 Code R525 R526 R320
4.11 Pipe brackets Stand off
N.B: Depth of gutter insertion, 42 mm
Nominal size mm 65
Code R388
Nominal size mm 114 Code R394
Nominal size mm 65 Code R373
N.B: Depth of gutter insertion, 30 mm To reduce vandalism and where there is no offset projection
Snap fit clip 4.08 Multi-positional outlet
Suitability 65 mm and 68 mm downpipes Code R400 Code Hole-cutter R401 Nominal size mm 65 mm Code R371
Spigot fits inside pipes. Not available in grey
Single fixing. For use in restricted areas, e.g. on glazing bars.
RAINWATER SYSTEM 4.12 Pipe connector
Nominal size mm 65 Code R389
SQUAREFLO 4.15 Branch 1121/2
Nominal size mm 65 Code R392
4.13 Bends 1121/2 offset Nominal Code size mm
65 R390
4.16 Shoe
Nominal size mm 65 Code R391
Standard offset using 2 bends 112 2 = 70 mm
4.17 Hopper head
Nominal size mm 65 Code R14
Nominal size mm 65 Code
Standard offset using 2 bends 92 1/2= 120 mm
4.18 Adaptors Square/round
4.14 Adjustable offset min 25 mm to max 65 mm
Nominal side mm 65 Code R399 Offset projection 25 - 65 mm
Swivel - 82 mm to square
Nominal size mm 65 Code R396
Cut to suit. Not available in grey Not available in grey
The Hunter Surefit system offers significantly reduced installation times and is integral to all 125 mm joint brackets, angles, outlets, and external stop ends. Simply snapping in the lengths of guttering ensures speedy, positive location at all joints saving time and money.
fast installation Greater flow capacity
Surefit clipping system for
Ideal for domestic or light commercial buildings Choice of downpipes
R611 - uses 68mm round downpipe R682 - uses 82mm round downpipe
R611 68mm outlet
R682 82mm outlet
Black Grey Van Dyke Brown White
Nominal size mm 125 Length m 4
125 5.05 Running outlet
Nominal size mm 68 82 Code
GUTTER AND FITTINGS 5.01 Gutter
Code R640
R611 R682
5.06 Stopend external 5.02 Joint bracket
Nominal size mm 125 Code
Nominal size mm 125
Code External R613
5.07 Stopend internal
5.03 Support bracket
Nominal size mm 125 Code R610
5.08 Adaptor seal
Nominal size mm 125 Code R600
5.04 Angle bracket
90 External 90 Internal 135 External 135 Internal R605 R615 R607 R617
84 160 94
Replaces standard seal allowing connection of other deep profile gutter systems
5.09 Galvanised rise and fall bracket
Code 230mm stake
208 138 138 210 100 86
Variable 230mm stake R26 Variable 300mm stake R27
Complete with fixing wings
5.10 Plain ended pipe
Nominal size mm 68 68 68 68 82 Length m 2 2.5 4 5.5 4 Code R518 R519 R520 R521 R700
5.13 Bend
Nominal size mm 1 / 2 offset 68 112 1 / 2 68 92 1 82 112 /2 offset Code R20 R577 R720
21 116 93
5.11 Bracket
Nominal size mm 68 68 82 Code 1 screw R19 2 screws R46 1 screw S606
5.14 Rainwater shoe
Nominal size mm 68 82 Code R21 R721
22 118 62
5.12 Connector
Nominal size mm 68 Pipe 82 Pipe 68 Drain (flexible) 82 Drain (flexible) Code
5.15 Reducer
R17 R717 DS24 * DS24 *
82mm spigot to 68mm socket
68 * Available in black only
110mm socket to 68mm socket
110mm spigot to 82mm socket
The Hunter Surefit system offers significantly reduced installation times and is integral to all Regency joint brackets, angles, outlets, and external stop ends. Simply snapping in the lengths of guttering ensures speedy, positive location at all joints saving time and money.
6.00 REGENCY
q Unique, curved and stepped profile q Ideal for all modern,
period and architecturally designed properties q High capacity q Simple to install
R908 R910
R891/ R893/ R894
Hunter Regency offers complete price and style versatility. Regency gutter outlets are suitable for use as standard, with Regency or Squareflo rainwater pipes. Alternatively, 68mm round downpipes may be installed, using an adaptor R924.
Regency - uses (74 mm) Regency profile downpipe
Regency Squareflo - uses
square (65 mm) downpipe
Black Van Dyke Brown White
RAINWATER SYSTEM 6.01 Gutter
Code R896
6.05 Angles 90 External
Nominal size mm 90 125 Code R935
6.02 Joint bracket
Nominal side mm 125 Code R908
Nominal size mm 90 125 Code R945
135 External 6.03 Support bracket Double screw fixing
Nominal size mm 125 Code Nominal size mm 90 125 Code R937
Nominal size mm 90 125
Code R947
6.04 Galvanised rise and fall bracket
Nominal size mm 125 Code R909
6.06 Outlets Running outlet - Regency
Nominal size mm 125 Code R911
N.B. depth of gutter insertion = 30 mm. Suits both Square and Regency downpipes
RAINWATER SYSTEM 6.07 Stopends Stopend External
Nominal size mm 125 Code R913
REGENCY 6.12 Bends offset 112 1/2
Nominal size mm 74 Code R920
Nominal size mm 125 Code R902
6.13 Shoe
Nominal size mm 74 Code R921
6.08 Pipe
Nominal size mm 75 Length 2.5 4 5.5 Code R891 R893 R894
6.14 Adaptor, Regency to 68 mm pipe connector 6.09 Pipe bracket
Nominal size mm 74 Code R919
Nominal size mm 74
Code R924
6.15 Branch 112 1/2 6.10 Bracket spacer
Nominal size mm 74 Code R927 Nominal size mm 74 Code R922
Available in Van Dyke Brown only
6.11 Multi-positional outlet
Suitability 65 mm and 68 mm downpipes Code R400 Code Hole-cutter R401
6.16 Hopper head
Code R14
7.00 OGEE
q Classic ogee profile q Compatible with cast iron q Light in weight, ideal for
replacement of cast iron to maintain character
q Ideal for Local Authority
q Offers labour savings
over cast iron and aluminium systems
q Simple to install
Hunter Ogee to cast iron ogee
Safety Please take special care when removing old cast iron systems, since they can be extremely heavy and therefore dangerous.
Colour range unless otherwise stated.
RAINWATER SYSTEM 7.01 Gutter
Nominal length Code size mm m 130 4 R876
OGEE 7.06 Angles External
Nominal size mm 130 90 120 135 A B Code
174 R805 (shown) 105 R806 82 R807
7.02 Joint bracket
Nominal size mm 130 Code R808
N.B. R806 and R807: Depth of gutter insertion = 32 mm
Nominal size mm 130 90 135 A B Code
N.B. depth of gutter insertion = 28 mm
176 R815 (shown) 80 R817
7.03 Support bracket
Nominal side mm 130 Code R810
N.B. R816 and R817: Depth of gutter insertion = 32 mm
7.07 Stopend External 7.04 Outlets Running outlet
Nominal size mm 130 Code R811 Nominal size mm 130 Hand LH RH Code R823 (shown) R813
7.08 Connectors Ogee to Cast Iron Ogee
N.B: depth of gutter insertion = 32 mm
Nominal size mm 130 Hand LH RH Code R822 R812 (shown)
Nominal size mm 130
Code R886 R885 (shown)
N.B: depth of gutter insertion = 29 mm Available in black only
7.05 Galvanised rise and fall bracket
Nominal size mm 130 Code R818
Nominal size mm 68 68 68 68
7.12 Bends cont.
Code R518 R519 R520 R521
RAINWATER SYSTEM OGEE 7.09 Pipe (plain ended)
External diameter A 68 68 68 68 Length m 2 2.5 4 5.5
112 1/2 offset 68/50 mm
Nominal size mm 68 A 28 B 42 Code R20
7.10 Pipe connector
7.13 Branches 112 1/2 - 68 mm
7.11 Brackets Single screw fixing/snap fit
7.14 Shoe
Nominal A B size mm 68 35 45 C 101 Code R21
7.12 Bends 92 1/2 - 68 mm Nominal Code size mm 68 R577 7.15 Adjustable offset
RAINWATER SYSTEM 7.16 Hopper heads
Nominal Code size mm 68 R14
OGEE 7.18 Drain connector - external use only
Nominal size mm 50, 65, 68 Code DS24
Mult rainwater adaptor (Flexible) Fts 110mm pipe or socket Available in black only
7.19 Reducer
Nominal size mm 68 Code R3
7.17 Access pipe
Nominal size mm 68 Code R1
PROFILES HI-CAPACITY
The Hunter Surefit* system offers significantly reduced installation times when compared to conventional materials. Simply snapping in the lengths of gutter ensures speedy positive location of all joints - saving time and money. Integral, pivoted clips allow fast, simple, 'snap-lock' assembly and disassembly of gutter Fixing wings allow easy fast fixing, whether using hand or power tools
Integral,recessed, pre-lubricated EPDM seal is robust and watertight
Bottom fixing to protect against wind and snow loading
8.00 STORMFLO
q Surefit* clipping system for fast,
easy installation Profile Dimensions (mm)
q Ideal for new and refurbishment
q Choice of 110mm or 160mm
downpipes for price, style or capacity flexibility
Stormflo offers the option of either 110mm or 160mm downpipes.
RAINWATER SYSTEM 8.01 Gutter
Nominal size mm 200 Length m 4
Code R740
8.07 Outlet adaptor Nominal size mm 200 Code R716
for 110mm Highflo downpipes
See Highflo rainwater pipe and fittings for 110mm
8.02 Joint bracket
Nominal size mm 200 Code R708
8.08 Pipe (plain ended)
Nominal size mm 160 160 160 External diameter A 160 160 160 Length m 3 4 3 Code S534 S535 S533
Insertion depth 80mm
8.03 Support bracket
Nominal size mm 200 Code R710 NOTE: S533 Single socket
Fix at 800mm centres
8.09 Brackets Single screw fixing
Nominal size mm 160 Code
8.04 Running outlet
Nominal size mm 200 Outlet spigot fits 160mm pipe Use R716 to adapt to 110mm Insertion depth 80mm Code R711
Pipe Socket fixing
Nominal size mm 160 Code S571
27 200 120
8.05 Stopend external
Nominal size mm 200 Code R713
8.10 Pipe connector
Insertion depth 80mm Nominal size mm 160 Code
8.06 Angles - Spigot Ends 90/135
Nominal A size mm 200 170 200 86 B 362 151 C 358 194 Code R705 (shown) R707
Nominal size mm 160 Code DS438
Fixing To make sure gutter systems are securely installed, ensure suitable rustproof fixings are used and that the correct length of fixing is selected. Hunter recommends No. 12 round headed screws or equivalent for Stormflo and that support brackets are fixed at 800mm centres.
RAINWATER SYSTEM 8.11 Bends/offsets 92 1/2 bend
Nominal size mm 160 Code S403
8.11 continued Top offset - 112 1/2 spigot tail
Nominal A size mm 160 178 B 88 Code S436
Also used as a rainwater shoe
Nominal size mm 160 Code S404
8.12 Branch 92 1/2
Nominal size mm 160 Code S427
Standard offset using 2 bends = 100 mm.
Top offset 112 1/2
Nominal size mm 160 Code S424
8.13 Reducer
Nominal size mm 160 Code S420
Standard offset using 2 bends = 168 mm
Bottom offset 112 1/2
Nominal size mm 160 Code S425
8.14 Access pipe
Nominal size mm 160 Code S472
8.15 R410 Uni-Fit Outlet
Hunter's 110mm Uni-Fit outlet is particularly suited to large capacity fibre cement, plastic or metal gutters with a thickness of between 1mm and 15mm. Once a hole has been cut into the gutter, the threaded sections screw together to form a secure watertight joint. No need for messy mastics, sealants or rivets. Uni-Fit can be pre-installed and should always arrive on-site in pristine condition, unlike alternative outlets, which need to be fabricated in-situ because they are easily broken in transit. Hunters 65/68mm Uni-Fit outlet is suitable for use with PVCu, pressed steel, cast aluminium and GRP domestic square section gutter systems. The outlet can solve capacity problems by preventing localised gutter over-spill and is easily installed anywhere within the gutter run. The outlet spigot is designed to accept 68m round or 65m square downpipes. The Uni-Fit domestic outlet is particularly useful when installed on a conservatory where a normal gutter outlet may obstruct a window opening, or fall below the fascia sight-line. No offsets are required, simply site the outlet so that the connecting pipework is adjacent to a glazing bar. When fitted on a corner Uni-Fit converts an angle to a running outlet. Both the 110mm high capacity and 65/68mm domestic Uni-Fit outlets are designed to save valuable on-site time and money. They may be fitted on new or existing systems and can usually be inserted after the guttering is installed.
Typical 110mm installation
Threaded outlet Industrial gutter
Seal Spigot suits 110mm socket
The outlet is suitable for use with flat bottom gutters, with a thickness of between 1mm - 15mm.
Description UNI-FIT OUTLET
Quick and easy to install No need for costly formed outlets High capacity outlet for agricultural, commercial and industrial uses Maintenance free
For Agricultural, Industrial & Commercial applications Spigot fits 110mm socket
G R410
PROFILES HIGHFLO
9.00 HIGHFLO
RAINWATER SYSTEM 9.01 Gutter
Nominal size mm 170
9.06 Angle 90
Nominal size mm 170 Code R451
245 199 111
Length Code m 4 R515
9.02 Joint bracket
Nominal size mm 170 Code R42
9.07 Pipe (plain ended)
Nominal size mm External diameter A Length m Code
S505 S506 S508
9.03 Support bracket
Nominal size mm 170 Code R452
NOTE: S508 Single socket
9.08 Brackets 9.04 Outlets Running outlet
Nominal size mm 170 Code R454
Nominal size mm Code
Code R455
N.B. Dimension E is gutter insert to end face of stopend
9.05 Stopend external
Nominal size mm 170 Code R402
Pipe/socket Galvanised
146 30 90
RAINWATER SYSTEM 9.09 Bends 92 1/2 - 110 mm
Nominal size mm 110 Code S322
9.11 Branch 92 1/2 /1121/2 Nominal A B C size mm 110 60 155 85 110 105 145 95
Length Code m 4 S334 4 S336
Spigot tail 135
Nominal size mm 110 Code S331
9.12 Shoe
Nominal size mm 110 Length m 4 Code S266
Offset 112 1/2 top
Nominal size mm 110 Code S270
9.13 Access pipe
Nominal size mm 110 Code S309
Offset 112 1/2 bottom
Nominal size mm 110 Code S271
9.14 Hopper head 9.10 Connectors Pipe connector
Nominal size mm 110 Code S208
63 95 45 116 132 56 15 11 223
Nominal size mm 110
Code R465
316 184 203
Nominal size mm 110 Code DS349
N.B. Dimensions from back to centre of outlet are: R465 - 92 mm
9.15 Adaptor - to other materials
Nominal size mm 110 Code
INSTALLATION PROCEDURES/DETAILS
10.00 INSTALLATION PROCEDURES Position outlet Establish fall Fix support and joint bracket Buildings with fascias Fixing corner angles Install gutter and downpipe Gutter positioning Fault finding tips Gutter to gutter connections Rise and fall brackets Rainwater hopper heads Downpipe installation Downpipe offsets Downpipe brackets Internal and external Rainwater pipes Connecting downpipes to drain (Surface water only) Connecting downpipes to gullies (Combined systems) Repair and replacement Connecting PVC-U Half round /Squareflo to C.I. Half round gutter Connecting to spigot Connecting PVC-U Half round to C.I. Ogee gutter Pipe cutting, gutter cleaning and maintenance Safety
The unique Surefit system allows simple fixing as follows. A. Insert the rear gutter edge under the back retaining lip of the snap lock clip. B. Ensure that it is fully home. C. With all fingers over the front edge of the gutter, pull down, while pushing up on the fitting with your thumbs until the gutter snaps into position. Gutter seals are pre-lubricated, however additional silicone lubricate may aid installation. Lifting the clips allows simple removal of the gutter. NB: Always ensure seals are free from dirt and grit
Before starting work, check that fascia boards are level and straight; crooked fascias can produce the appearance of a wavy gutter. Use a plumb line centred over any gully or drain connection to establish the position of the outlet. Using 25 mm (1) x No 10 sheradised round head screws, fix the outlet to the section of fascia board at the appropriate height for level gutter or gutter with falls. Screws should be located through the moulded lugs. Where moulded lugs are not pierced, fittings may be drilled (running outlets must always be fixed with two screws). Note: Use 38 mm (11 2) x No 12 sheradised round head screws for Stormflo or screw length to suit fixings. ESTABLISH FALL Fix a support bracket at the end of the fascia board furthest from the outlet. Position the bracket towards the top of the fascia board, to create a fall to the outlet not steeper than 1:350 (BS EN 12056 - Part 3). N.B: Excessive gap between lowest edge of roof and top of gutter must be avoided. FIX SUPPORT AND JOINT BRACKET A string secured tautly between the outlet and the furthest bracket will assist in installing the gutter in a level line. For gutters that are to be fixed level, a spirit level should be used against the string (see diagram above). Support or joint brackets are fixed at a maximum of 1 metre centres, (800mm for Stormflo and Ogee profiles). For fixing recommendations in areas subject to heavy snow and for steeply pitched roofs, see Snow loads on page 4. More detailed information is provided in BS EN 12056 - Part 3. BUILDINGS WITHOUT FASCIAS On older properties not having fascia boards, Hunter side or top rafter brackets are used, suitable for use with all Hunter rainwater systems except 170 mm Half round and 200mm Stormflo. The brackets are screwed to exposed rafters and come complete with fixing nuts and bolts for securing outlets and brackets. The installation procedure is as above. On buildings without projecting eaves, and no fascia board, use Hunter variable rise and fall brackets, supplied with fixing stake for brickwork. FIXING CORNER ANGLES Except for the Surefit system, internal and external angles are provided with moulded lugs which can be drilled for fixing direct to the fascia. The next gutter support may then be fixed up to 1 metre away. It is recommended that corner angles should be fixed to the fascia. Where this is not possible, support brackets should be fixed not more than 150 mm from each end of the fitting.
Surefit joint bracket
Snap fit for other systems
NB: The pivot clips must not be removed from fittings
For all other systems Snap fit the guttering by inserting the rear gutter edge under the back retaining lip of the bracket. Ensure that it is fully home, then pull the front of the gutter down to engage in the front lip. This is done by exerting pressure with the thumb and forefinger of both hands until the gutter clicks into place (see diagram). The top edge of the gutter must not be cut, filed or notched in any way. Gutter ends must be clear of any swarf, burrs, dirt or sharp matter which may damage the seals. Downpipe lengths are then jointed by means of pipe connectors and secured by pipe brackets fixed at max. of 1.8 metre centres. GUTTER POSITIONING
The gutter should, where practicable, be fixed centrally under the roof edge and close beneath it, particularly where roof edges that give a wide spread of water are used.
If a fall is required, although plastic guttering can be fixed level, a recommended rate of fall Is 1:350. Too steep a fall should be avoided, as this leads to an excessive gap between the lowest edge of the roof and the top of the gutter. Any roof felt or eaves ventilator tray skirt should be extended to just below the top of the gutter edge, to prevent wind blowing water behind the gutter.
FAULT FINDING TIPS 1 Fittings not screwed to the fascia. This causes the gutter to pull out of the fittings, as there is no restriction on movement.
2 Gutter cut short between fittings. This causes it to ride over the sealing rubbers. All Hunter fittings are marked with an insert to here line to assist the installer.
3 Recommended spacing of gutter clips exceeded. This causes guttering to sag in hot weather, thereby restricting thermal movement. 4 The roof tiles overhanging the centre of the gutter. Causes the rainwater to overshoot the gutter. The correct position for the gutter is fixed centrally under the roof tile end. 5 An excessive gap between the lowest edge of the roof and the top of the gutter. Causes the rainwater to overshoot the gutter. 6 No roofing felt, or felt cut short. In all cases, roofing felt should be extended to just below the top edge of the gutter to prevent wind blowing water behind the gutter. 7 No silicone lubricant used when installed. This may lead to irritating juddering noises caused by the restriction of natural expansion and contraction of the gutter.
INSTALL GUTTER AND DOWNPIPE To ease installation and reduce thermal movement noise factor after installation, lubricate the seals in joint brackets, outlets and angles with either Hunter liquid lubricant (SC960-3ml/SC966-250ml) or Hunter silicone spray (SC967-300ml). NB: Washing-up liquid should not be used as a lubricant There are two methods of fitting guttering together: For 112 mm Half round and 114mm Squareflo
NOTE: For installation to PVC-u fascia contact the board manufacturer for recommended fixings
NOTE: It is essential that fascia boards treated with creosote are left for at least 48 hours to dry before fixing commences
Warning Pipes Internal rainwater pipes must be able to withstand the head of water likely to build up if a blockage occurs. However, to indicate that the pipe is in danger of being filled to the roof level warning pipes should be provided above the point where a blockage is likely to occur, e.g at the base of the stack and at changes of direction. It is important to note that flexible joints on all types of modern pipe systems are able to withstand an approximate head of 0.5 bar or 5 metre head of water. On plastic pipe systems warning pipes can be made using waste pipe or overflow pipe. Sealed Joints: Small diameter joints (50 74mm) should be cleaned with solvent cleaner and sealed with solvent cement. The larger diameter ring seal joints (82mm plus) should have the end of the pipe cut square, chamfered and lubricated before insertion into the ring seal socket. SAFETY TIPS
Support: All rainwater pipe connectors, shoes and bottom-offset bends should be supported to prevent the pipe slipping out of position. All other brackets are to be spaced at: Dia 50 - 74mm 75 - 110mm 160mm Vertical/Horizontal 1.2m 0.6m 1.8m 0.9m 1.8m 1.2m
Offset pipe: The pipe from the eaves gutter outlet to the face of the wall should be offset using 2 no. 112 degree bends. Smaller offsets, between 22 - 80mm (R24) and 25 - 65mm (R399), are made with the Surefit Half Round or Squareflo Adjustable offset. Rainwater pipe bends not manufactured as stock items are to be fabricated by Hunter Plastics Ltd. fabrication service department. Horizontal pipes: The joints on horizontal pipes should be sealed and when fixed internally, they should be tested as for internal rainwater pipes. Internal rainwater pipes: To compensate for thermal movement only pipes and fittings with ring seal joints must be used within a building. Internal rainwater pipes should be tested to withstand a constant air pressure of 38mm water gauge for three minutes (England, Wales and Northern Ireland) and 50mm water gauge for five minutes (Scotland). When rainwater pipe from eaves guttering is to be run within a building the transition from the smaller diameter pipe to the larger diameter, should e done in the shortest distance and with the minimum number of joints. All joints should be watertight. To connect 68mm diameter rainwater pipe to 82mm pipe use Hunter reducer (R4). To connect 68mm diameter rainwater pipe to 110mm pipe use hunter reducer (R3). Access to Pipes All parts of the pipework system should be accessible to hand held rodding equipment with adequate number of points for removal of debris from the system.
When using a ladder, make sure it is securely fixed and on level ground. If the ground is smooth or slippery, place a bag filled with sand or soil at the foot of the ladder. Take care not to over-reach, Take special care when removing old cast iron systems, as they can be extremely heavy and therefore dangerous.
DOWNPIPE INSTALLATION 1. Allowance for expansion must be made on external rainwater downpipes, by leaving a gap of approximately 6 mm between spigot connections. 2. Fix each subsequent length of pipe in a similar manner, securing at the lower end with pipe connector and pipe bracket and ensuring 6 mm gap is allowed at each joint. 3. Fix additional pipe brackets as required to provide support for pipes, not further apart than 1.8 metre centres. 4. A bracket must be fitted around the shoe, to support the bottom section of pipe. 38 mm (11/2) x No.12 sheradised round head screws are recommended for rainwater pipe bracket fixings. 5. Joints on external vertical rainwater pipes are to be left unsealed. OFFSET PIPE The pipe from the eaves gutter outlet to the face of the wall should be offset using 2 no. 112 degree bends. Smaller offsets, between 22 - 80mm (R24) and 25 - 65mm (R399), are made with the Surefit Half Round or Squareflo Adjustable offset. Rainwater pipe bends not manufactured as stock items are to be fabricated by Hunter Plastics Ltd. fabrication service department.
GUTTER TO GUTTER CONNECTIONS Gutter to gutter connections are made using joint brackets (these have 2 rubber seals). Markings on the inside front face indicate the gap that must be left to accommodate thermal movement. To allow for consistent thermal movement of each section of gutter, joint brackets must always be securely fixed. Alternatively with half round systems gutters may be joined by means of a gutter union which must be secured in position by a support bracket. NB: Every effort should be made to ensure that unsecured lengths exceeding 1 metre are not installed adjacent to external Stopends.
For buildings without fascias, galvanised rise and fall brackets are available for most of the Hunter range of gutter profiles as an alternative to top or side fixing rafter brackets. These may be built in to the brickwork as work proceeds, or driven in after construction. When installing, all gutter unions and ends of gutters should be supported by a bracket, with intermediate brackets at not greater than 1 metre centres (800mm for Ogee). Running outlets should be supported by a bracket at both ends. RAINWATER HOPPER HEAD Rainwater hopper heads are available to collect discharging water from flat roofs or from adjacent rainwater downpipes, to suit Half Round and Squareflo profiles. Two styles and outlet sizes are available. They are provided with two fixing lugs. See pages 14 and 18 for details and dimensions. DOWNPIPE BRACKETS There is a wide choice of downpipe bracket for use with any of the downpipe profiles, including single screw, single screw/snap fit, double screw and socket fixing types. The Regency system includes a bracket spacer, giving scope for minor offset adjustments.
CONNECTING DOWNPIPES TO DRAIN (SURFACE WATER ONLY)
Illustrated are three common methods of connecting rainwater pipes to a surface water drainage system. For further details, refer to the Hunter Underground Technical Handbook (UGT).
The pipe assembly sequence is reversed when the downpipe is to be connected to a drain or back inlet gully already in position. Assembly commences at the drain connection and proceeds upwards. REPAIR AND REPLACEMENT Existing systems can be repaired or replaced with the use of the appropriate Hunter gutter connector. This enables compatible systems to be connected (eg Hunter Half round to half-round) or for the profile to be changed (eg Squareflo to half-round, Half round to Ogee). It also enables Hunter PVC-U systems to be connected to existing asbestos cement, cast iron, or PVC-U systems.
Connection to vitrified clay spigot with DS 350/351
CONNECTING PVC-U HALF ROUND/SQUAREFLO TO C.I. HALF ROUND GUTTER (SEE DETAIL BELOW, LEFT)
Connection is simpler if the existing half round gutter can be dismantled at the nearest suitable joint. With cast iron or asbestos cement systems this can be achieved by removing the gutter bolt. If this proves difficult because of rust or paint, the nut may be cut off with a hacksaw. Whichever the case, the gutter or joint must be thoroughly cleaned with a wire brush. In the case of existing PVC-U guttering, the gutter should be dismantled at the nearest joint or cut through with a saw. The new length of Hunter gutter should be measured to allow sufficient length at each end for an expansion joint.
Shoe discharging to vertical PVC-U hopper CONNECTING TO SPIGOT
Sawing through the gutter will leave a spigot for connection. When connecting to cast iron or asbestos cement guttering, which both exist in a variety of sizes, experiment with the connector by positioning inside or outside the gutter to obtain the best fit. Place the connector inside existing 100 mm gutter and outside 110 mm gutter. Locate clip over appropriate level and tighten nut and bolt to suitable stress. Snap new length of Hunter gutter into position. The joint should be made with a suitable jointing compound.
Connection to vertical PVC-U drain using R3 reducer
CONNECTING DOWNPIPES TO GULLIES (COMBINED SYSTEMS)
Illustrated are three common methods of connecting rainwater pipes to a combined underground drainage system. In a separate (surface water only) drainage system, trapped gullies are not normally required, but the Local Authority should be consulted. For further details, refer to the Hunter Underground Web site pages.
CONNECTING PVC-U HALF ROUND TO C.I. OGEE GUTTER (RIGHT ABOVE) AND C.I. HALF ROUND GUTTER (LEFT ABOVE)
Either dismantle gutter at a suitable point or cut with hacksaw and drill new hole to align with hole in the Hunter Ogee connector. Thoroughly clean gutter and spread inside liberally with non-bitumastic based compound. Position the appropriate connector (left hand or right hand) firmly onto compound. Push the gutter bolt through both holes and tighten nut until compound begins to squeeze from joint. Do not overtighten. Finally, snap Hunter gutter length into position.
For safety and assisting in cutting pipe square use either stiff paper or pipe support bracket
When cutting gutter or pipe on-site Hunter recommend it to be; clean cut at right angles to its axis cut end then deburred with a scraper if cut end of pipe is inserted into a push-fit or solvent weld joint then the spigot end must be chamfered to ensure that the glue or sealing ring is not displaced during insertion
Safety The relevant regulations are outlined in the Health and Safety At Work Act 1974 and should be followed. Hazard sheets, dealing with potential hazards of working with solvent cement and silicone lubricant are available from Hunter Plastics.
Use a fine tooth saw
Chamfer and lubricate pipe
uPVC gutter cleaning and maintenance Although uPVC gutters fare considered to be relatively maintenance-free it is important to clear rainwater goods of fallen leaves and other debris at least once a year. More frequent inspections may be necessary in areas of high pollution and where there are trees in the vicinity. Inspection of the gutter and supports is also advisable during and after periods of ice formation in the guttering system. In some cases our lighter coloured gutter system may require cleaning. We recommend the plastic is washed sown with a solution of soapy warm water, in severe cases a non-abrasive kitchen cream cleaner should be used. Should the instance arise where the gutter requires painting, we suggest the system be cleaned with a degreasing agent such as sugar soap. After cleaning paint with two coats of a good quality topcoat paint. Scoring or roughening the surface of the plastic to form a key for the paint will effect the overall finish and is not recommended.
11.00 HANDLING AND STORAGE Handling Storage Loose pipe Spigot and socketed pipe Fittings Safety Tips
PVC-u pipes are very strong, but having said that care should be taken when handling to avoid damage, such as scratching or scoring. Not only does this affect the look of pipework but can also affect the jointing of the push-fit or solvent weld fittings. In extreme cold conditions extra care should be taken, because extreme conditions reduce the impact strength of most plastics. Pipes should be loaded by hand if possible, but if mechanical means are used then protected slings are recommended. In addition, when unloading block bundles use nylon belt type slings or fork lift trucks with smooth forks (metal hooks, slings or chains must not come into contact with the pipes). STORAGE OF PIPE 110mm DIA AND LARGER For on-site storage, lay pipes on flat ground, free from large or sharp objects - or preferably on timber battens not less than 75 mm wide spaced at a maximum of 1 m centres. In addition, side support should also be provided at intervals of not more than 1.5 m. Block bundles can be stored up to three high without extra side supports or bearers. Extra care should be taken when removing pipe from bundles as the straps are under extreme tension and may move erratically when cut. LOOSE PIPE 110mm DIA AND LARGER Different sized pipe should be stacked separately. If this is not possible we recommend that larger sized diameter pipe should be stacked at the bottom, not more than seven layers high or to a maximum height of 2 m. SPIGOT AND SOCKETED PIPE Spigot and socket pipes should be stacked with sockets protruding and at alternate ends to ensure even support along their length. 2m
STORAGE OF GUTTER FITTINGS Eaves gutters and small diameter rainwater pipe must be laid on a continuous smooth and level base. Stacks of gutter ad pipe must not exceed 1.25 metres in height. Bags of fittings or wrapped bundles of gutter and pipe must never be stored in direct sunlight or unventilated space but must be stored in a cool, dry place. Whilst wrapped, direct sunlight or hot unventilated places can cause the temperature of materials to rise and in extreme conditions can result in distortion.
Loose pipe storage on the ground
12.00 FLAT ROOF OUTLETS Introduction Roof outlet drainage data Installation procedures Profiles Typical site work detail
Hunter roof outlets are three-piece components manufactured in PVCu and consist of a funnel shaped body, clamping ring and grille. Hunter flat roof outlets are a natural choice when considering roof drainage in commercial, domestic and industrial applications: they are easy to install and compatible with most types of roofing materials including hot asphalt, bituminous felt and PVCu roof membrane. The outlet features an integral, ribbed clamping ring and a pre-drilled flange for quick, secure anchorage. The grille design offers efficient filtering and is easily removed for cleaning and maintenance. The range of spigot and socket tails, box gutter and balcony outlets are durable, lightweight and offer highly efficient flat roof drainage. Working on the national average rainfall intensity of 75mm per hour, a single 82mm Spigot Tail outlet, for example, can drain a roof area of up to 310m2 (6.45 litres per second) and a single 160mm size outlet can drain up to 515m2 (10.72 litres per second). The depth of water that can be allowed upon a flat roof during a storm depends upon the method of construction, its inherent strength, and upon the height of the upstand and other features that project through the roof. However, water depths of up to 35mm around the flat roof outlets are acceptable if these considerations are met.
Benefits q Compatible with most flat roofing materials, including hot asphalt, bituminous felt and PVCu roof membranes q Comprehensive range of sizes available
ROOF OUTLET DRAINAGE DATA Maximum roof area that can be drained by one outlet(with or without box gutter)
Nominal outlet and pipe size Maximum depth of flow at edge of outlet 35mm (13/8) 32mm (1
q Quick and easy to install q Non corrosive and maintenance free q Replacement components available
82mm 2 m 310 210 145 115 80
110mm 2 m 380 330 230 150 85
160mm 2 m 515 440 310 200 95
25mm (1) 19mm ( 13mm (
Note: These values are based upon: q Rainfall intensity of 75mm(3) per hour q Absence of abutting vertical walls rising above roof level q NB. Reduce the above figures by 20% when using balcony outlets
1. The roof construction should have an appropriate size hole. To give support to the sloping sides of the roof outlet, the roof screed should be dished. All roof outlets must be securely fixed to the roof structure. Roof outlet is now placed in position, making sure that the spigot is truly vertical and then giving a sound push-fit connection into the rainwater pipe. Remove grating and clamping ring. Hot asphalt is applied to the roof in layers. The first layer should be allowed to flow into the roof outlet. The clamping ring is now secured by the brass wingnuts down onto the hot asphalt. Although the outlet flange will soften from the effect of the hot asphalt, there will be no distortion providing the correct support is given. Finish the second asphalt coat to the outlet opening edge and cover with a dusting of fine sand. Fix the grating in position with the bolts.
Roof outlet and downpipe sizes for flat roofs. The following example illustrates the use of the drainage data table
1. Determine outlet positions: Underground drainage schemes will permit two downpipes to be used. Determine design requirements: Constructional factors require depth of water at edge of outlet to be limited to 19mm. Calculate roof area: 23 x 9 = 207 sq. m. Consult table and select outlet size appropriate to roof area and any limitations on depth of flow at edge of outlet: A single 110mm outlet would drain 230 sq. m. That is more than the whole of this roof area if a depth of flow at edge of outlet of up to 25m was acceptable and is satisfactory falls to the roof could be provided. However, with the depth of flow at edge of outlet limited to 19mm, two 82mm outlets will drain 2 x 115 = 230 sq. m. and will, therefore, drain this roof with a reasonable margin, assuming a rainfall intensity of 75mm per hour. Downpipe size will be the same as nominal size of outlet: 82mm. Further guidance on selecting an acceptable rainfall intensity can be found in the National Annex of BS EN 12056: 3: 2000.
1. 2. 3. 4. 5. 6. 7. The hole in the roof should be as in 1 above. Set the flange on the roof outlet into a recess in the roofboarding to give a level finish. When applying the liquid bitumen to the roof, allow it to cover the outlet flange and the sloping part of the outlet. Then when bonding the felt onto the roof with the liquid bitumen, the felt should be taken over the outlet top flange. Cut the part of the felt over the hole of the outlet. Using a blow lamp form the felt down onto the sloping edge and retain with the clamping ring and wing nuts. With the bolts, fit the grating into position. 3. 4.
1. 2. 3. 4. 5. The hole in the roof should be as in 1. above. Apply recommended adhesive to flange and sloping part of the outlet. Lay plastic material into flange and dress into outlet. Retain with clamping ring. fix grating into position with bolts.
Roof outlet Securing bolts Wing nuts Bolts Grating Clamping ring Outlet
Balcony outlet Securing bolts Wing nuts Bolts Flat grating Clamping ring Outlet
RAINWATER SYSTEM Spigot Tail
Size 82mm 110mm 160mm Code RV637 RV369 RV482 G G G
A 280 280 380 B 157 157 170 C 214 214 250 D 130 122 148
Socket Tail
Size 110mm Code RV372 Colours G A 280 B 157 C 214 D 110
Box Gutter - Straight Spigot Tail, Pre-fabricated
Size 82mm Code RV491 Colours G A 190 B 125
Balcony - Full Flat Grating, Solvent Socket Tail
Size 82mm 110mm Code RV195 RV196 Colours G G A 355 335 B 165 140
G = Grey B = Black V = Van dyke brown W = White Galv = Galvanised metal
NB: It may be necessary to provide a warning pipe to indicate blockage on internal rainwater systems. For more details refer to - NE.2.11 - BS EN 12056 - 3: 2000.
TYPICAL SITE WORK DETAIL
Roofing finish dressed into roof outlet Grid Membrane solvent welded to outlet if PVC type roofing
Outlet Clamping ring Outlet fixed to decking /frame with rust-proof screws
NB: It is important to prevent upthrust on the vertical rainwater pipe due to thermal movement from breaking the joint between the outlet and roof finish. Thermal movement can be accommodated by anchoring a push-fit socket with a socket bracket and allowing a 10mm expansion gap between spigot end and socket depth. A maximum of 4m between expansion joints should be allowed for. I may be necessary to provide a warning pipe to indicate blockage on internal rainwater systems. For more details refer to BS EN 12056 - 3
Additional fixing brackets for Hunter Domestic Gutter Systems
RAINWATER SYSTEM FIXING BRACKETS Rise and Fall Bracket
Code R377 R909 R818 R18 R601 Colours Galv Galv Galv Galv Galv Profile Squareflo Regency Ogee Half Round 112 125 All Supplied with 23mm stake R9 Galv Half Round 112 Supplied with 300mm stake
Code R26 R27 Colours B B Size 230mm 300mm Including galvanised stake, order gutter bracket separately. Supplied with fixing nuts and bolts.
Code R9A R18A Colours Galv Galv Size 300mm 230mm
Code R15 Colours Galv Supplied with wing nut and bolt. Not for use with 170mm or 200mm gutter.
Code R16 Colours Galv Supplied with wing nut and bolt. Not for use with 170mm or 200mm gutter.
Code R2 Colours G Use with 112mm Half Round & Squareflo support brackets. G = Grey B = Black Galv = Galvanised metal
13.00 HUNTER FABRICATION SERVICE
HUNTER FABRICATION SERVICE
Hunters fabrication department can provide the right solution to even the most demanding problem.We have helped contractors and specifiers overcome problems on site and at the design stage of your project. Hunters Fabrication team work very closely with the Technical department and pride themselves on providing the most innovative and technically advances service available. From our existing range we can mould or re-shape any of our products to your exact requirement. Sheet UPV-c is used for the more unusual designs. In addition, slight modifications can be made to existing Hunter products to suit regularly occurring problems such as special gutter angles for conservatories and bay windows etc. We can advise you on design possibilities and respond complete with part numbers and prices for your approval. You place the order from your local merchant stating the unique product number and price and we take care of the rest.
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