DRAFT UGANDA STANDARD   
  DUS 2094  
First  Edition  
2019 -mm-dd 
 
 
 Reference number  
DUS 2094:2019  
© UNBS 2019   
  
Eaves gutters and fittings made of PVC -U — Definitions, 
requirements and testing  
 DUS 2094:2019  
ii © UNBS 2019  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contrac t. Users are 
responsible for its correct application  
© UNBS 2019   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and m icrofilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2094:2019  
© UNBS 2019  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ...................... iv 
1 Scope  ................................ ................................ ................................ ................................ ................ 1 
2 Normative references  ................................ ................................ ................................ ....................... 1 
3 Terms and definitions  ................................ ................................ ................................ ...................... 2 
4 Materials  ................................ ................................ ................................ ................................ ........... 2 
4.1 Raw material  ................................ ................................ ................................ ................................ .....2 
4.2 Utilization of non virgin material ................................ ................................ ................................ ......3 
5 General characteristics of profiles — Appearance  ................................ ................................ ......... 3 
6 Geometrical characteristics of profiles  ................................ ................................ ........................... 3 
6.1 Width  ................................ ................................ ................................ ................................ ................. 3 
6.2 Length  ................................ ................................ ................................ ................................ ............... 3 
7 Physical and mechanical characteristics of profiles  ................................ ................................ ......3 
8 General characteristi cs of fittings  ................................ ................................ ................................ ...4 
8.1 General  ................................ ................................ ................................ ................................ ............. 4 
8.2 Appearance ................................ ................................ ................................ ................................ .......4 
8.3 Shape and dimensions  ................................ ................................ ................................ ..................... 4 
9 Physical characteristics of fittings  ................................ ................................ ................................ ..4 
10 Gutter sealing rings  ................................ ................................ ................................ .......................... 5 
11 Solvent  cements  ................................ ................................ ................................ ............................... 5 
12 Designation ................................ ................................ ................................ ................................ .......5 
13 Marking  ................................ ................................ ................................ ................................ ............. 6 
14 Fitness for purpose of gutter sy stems  ................................ ................................ ............................ 6 
15 Production control  ................................ ................................ ................................ ........................... 7 
A.1 Material definitions  ................................ ................................ ................................ ........................... 8 
A.1.1  Virgin mate rial ................................ ................................ ................................ ................................ ..8 
A.1.2  Own reprocessable material  ................................ ................................ ................................ ............ 8 
A.1.3  External reprocessable material  ................................ ................................ ................................ ......8 
A.1.4  Recyclable material  ................................ ................................ ................................ .......................... 8 
A.2 Reprocessable and recyclable material  ................................ ................................ .......................... 8 
A.2.1  Own reprocessable material  ................................ ................................ ................................ ............ 8 
A.2.2  External reprocessable  and recyclable materials with agreed specification  ................................ 8 
A.2.3  External reprocessable and recyclable material not covered by an agreed  specification  ..........  10 
Annex B (normative)  Impact test  ................................ ................................ ................................ ...............  12 
Annex C (normative)  Heat reversion test for fittings  ................................ ................................ ................  13 
Annex D (normative)  Water tightness test  ................................ ................................ ................................  14 
Annex E (informative)  Cross section areas  ................................ ................................ ..............................  16 
Bibliograp hy ................................ ................................ ................................ ................................ ................  18 
 DUS 2094:2019  
iv © UNBS 2019  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate t he elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade O rganisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia,  consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 04, Mechanical Engineering 
and Metallurgy . 
 DRAFT UGANDA STANDARD  DUS 2094:2019  
 
© UNBS 2019  – All rights reserved  1 
 Eaves gutters and fittings made of P VC-U — Definitions, 
requirements and testing  
1 Scope   
This Draft Uganda  Standard specifies requirements and test methods of eaves gutters and fittings made from 
unplasticized poly (vinyl chloride ) (PVC -U), and intended to be used for rainwater dr ainage . 
2 Normative references   
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
referenc es, the latest edition of the referenced document (including any amendments) applies.  
ISO 4665 , Rubber, vulcanized or thermoplastic -- Resistance to weathering  
ISO 625 9-2, Thermoplastics pipes -- Determination of tensile properties -- Part 2: Pipes made of unplasticized 
poly(vinyl chloride) (PVC -U), chlorinated poly (vinyl chloride) (PVC -C) and high -impact poly (vinyl chloride) 
(PVC -HI) 
ISO 23711 , Elastomeric seals -- Requirements for materials for pipe joint seals used in water and drainage 
applications -- Thermoplastic elastomers  
ISO 4633, Rubber seals — Joint rings for water supply, drainage and sewerage pipelines — Specification for 
materials  
ISO 306 , Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)  
ISO 2505, Thermoplastics pipes — Longitudinal reversion — Test method and parameters  
ISO 5 80, Plastics piping and ducting systems — Injection -moulded thermoplastics fittings -- Methods for 
visually assessing the effects of heating  
ISO 13229 , Thermoplastics piping systems for non -pressure applications — Unplasticized poly(vinyl chloride) 
(PVC -U) pipes and fittings — Determination of the viscosity number and K -value  
EN 1905, Plastics piping systems — Unplasticized poly(vinyl chloride) (PVC -U) pipes, fittings and material — 
Method for assessment of the PVC content based on total chlorine content  
ISO 10474, Steel and steel products — Inspection documents  
ISO 105 -A02:1993 Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in 
colour  
ISO 527 -2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and 
extrusion plastics   
ISO 1183 -3, Plastics — Methods for determining the density of non -cellular plastics — Gas pyknometer  
method  DUS 2094:2019  
2 © UNBS 2019  – All rights reserved  
 US ISO 9001 Quality management systems — Requirements  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1 
eaves gutter  
gutter situated outside the building and supported by brackets  
3.2 
down -pipe 
pipe fitted to a gutter to lead rainwater from the gutter to the drainage system or sewer  
3.3 
union -clip (gutter -union)  
fitting for joining two gutters and supported  only by those gutters  
3.4 
joint bracket (union -bracket)  
fitting for joining two gutters which is supported by the building structure  
3.5 
gutter adaptor  
fitting for joining two different shaped gutters  
3.6 
angle  
fitting for joining two gutters installed in  two different directions  
3.7 
stop end  
fitting for stopping the flow, fixed at the end of a gutter or an outlet  
3.8 
outlet  
fitting for draining off the rainwater from the gutter into the down -pipe 
3.9 
commercial length  
length of a gutter or a down -pipe whi ch was produced in a factory  
4 Materials  
4.1 Raw material  
The raw material shall be PVC -U to which are added those additives that are needed to facilitate the 
manufacture of components conforming to the requirements of this document.  DUS 2094:2019  
© UNBS 2019  – All rights reserved  3 
 When calculated on the  basis of a known formulation or in case of dispute or not known formulation, 
determined in accordance with EN 1905 the PVC content shall be at least 80 % by mass for profiles and 85 % 
by mass for injection -moulded fittings.  
4.2 Utilization of non -virgin m aterial  
Requirements for the utilization of non -virgin materials are given in Annex A.  
5 General characteristics of profiles — Appearance  
When viewed without magnification , the internal and external surfaces of gutters shall be smooth, clean and 
free from  scoring, cavities, and other surface defects. The ends of gutters shall be cut cleanly and square to 
the axis of the profile.  
6 Geometrical characteristics of profiles  
6.1 Width  
Gutters shall be designated by their upper opening width (size) (See examples  of cross section areas in 
Annex E). The manufacturer shall declare the usable area of the cross -section of the gutter at its designed top 
opening width for the calculation of flow capacity. This usable area shall be either marked on the gutter or 
given in  commercial documents.  
6.2 Length  
The manufacturer shall declare commercial length of a gutter which shall have a positive tolerance when 
measured at 2 3±2 °C. 
7 Physical and mechanical characteristics of profiles  
The requirements for the physical and mech anical characteristics and the conditions for the respective test 
methods shall conform to those given in Table 1.  
NOTE  Any conflicting parameters and requirements given in the test method standards referred to do not apply here.  
Table 1 — Physical and mec hanical characteristics of profiles  
Sl No  Characteristics  Requirement  Test parameters  Test 
method  
i) Hammer impact 
strength(type test)  No break or crack 
visible without 
magnification  Temperature  (0 ±2) °C  Annex B  
ii) Tensile strength (type 
test) ≥ 42 N/mm2 Speed specimen 
type 5 mm/min type 
2, 3 or 5 a 
conforming t o 
ISO 527 -2 ISO 6259 -2 
iii) Elongation at break 
(type test)  ≥ 100 %  Speed specimen 
type 5 mm/min type 
2, 3 or 5 a 
conforming to  
ISO 527 -2 ISO 6259 -2 
iv) Tensile impact strength ≥ 500 kJ/m2 Specimen type  type 2, 3 or 5  a ISO 8256  DUS 2094:2019  
4 © UNBS 2019  – All rights reserved  
 Sl No  Characteristics  Requirement  Test parameters  Test 
method  
(type t est) temperature  conforming to  
ISO 8256 (23 ± 
2) °C  
v) Heat reversion(type 
and production control 
test) ≤ 3% Test temperature  
Time  (100± 2) °C  
(30 ±2) min  ISO 2505  
vi) Vicat softening 
temperature (t ype test)  ≥ 75°C  Conforming to  ISO 306  ISO 306  
NOTE  In case of dispute, test specimen 5 shall be used.  
8 General characteristics of fittings  
8.1 General  
The following types of fittings shall conform to the requirements given in 8.2, 8.3 and Clause 9: uni on clip, 
joint-bracket, gutter adaptor, angle, stop -end, outlet , valley box  and expansion piece.  
8.2 Appearance  
When viewed without magnification the internal and external surfaces of fittings shall be smooth, clean and 
free from scoring, cavities, and oth er surface defects.  
8.3 Shape and dimensions  
The fittings shall be compatible with the shape and the dimensions of the profile or the gutter. The outlets shall 
be compatible with down -pipes and fittings.  
9 Physical characteristics of fittings  
The requireme nts for the physical characteristics and the conditions for the respective test methods shall 
conform to those given in Table 2.  
NOTE  Any conflicting parameters and requirements given in the test method standards referred to do not apply.  DUS 2094:2019  
© UNBS 2019  – All rights reserved  5 
 Table 2 — Physic al characteristics of fittings  
Sl No  Characteristics  Requirement  Test parameters  Test method  
i) Effect of heating  a) 
(production control test)  c) and  d) Temperature  
Time  (150 ± 2) °C  
(15 ± 2) min.  Method A of 
ISO 580  in air  
ii) Heat reversion b) (type 
test) No visible deformation 
without magnification  Temperature  
Time  (65 ±2) °C  
(30 ± 2) min.  Annex C  
iii) Vicat softening 
temperature  
(type test)  ≥ 75°C  Conforming to ISO 306  ISO 306  
a)  Without seal and only for injection -moulded fittings.  
b)  For fitti ngs produced by processes other than injection moulding.  
c)  i)  Within a radius of 15 times the wall thickness around the injection point, the depth of cracks, delamination or blisters shal l not 
exceed 50 % of the wall thickness at that point.  
ii)  Within  a distance of 10 times the wall thickness from the diaphragm zone, the depth of cracks, delamination or blisters shall not 
exceed 50 % of the wall thickness at that point.  
iii)  Within a distance of 10 times the wall thickness from the ring gate, the leng th of cracks shall not exceed 50 % of the wall 
thickness at that point.  
iv)  The weld line shall not have opened more than 50 % of the wall thickness at the line.  
v)  In all other parts of the surface the depth of cracks and delaminations shall not exceed 30 % of the wall thickness at that point.  
Blisters shall not exceed a length 10 times of the wall thickness.  
d)  After cutting through the fitting, the cut surfaces shall show no foreign particles, when viewed without magnification.  
 
10 Gutter sealing rin gs 
10.1 The gutter seals shall have no detrimental effect on the properties of gutters and fittings and shall 
enable the test assembly to conform to Table 3.  
10.2  Materials for sealing rings shall conform to ISO 23711  or ISO 4633  as app licable.  
11 Bonding  
Gutters and fittings shall be capable of being bonded with a suitable adhesive without causing  detrimental 
effects  to the properties of the resulting profiles and o r the fittings and the test assembly shall to conform to 
Table 3.  
12 Designation  
Eaves gutters and fittings shall be designated by:  
a) descriptio n of the product, e.g. gutter, stop end, outlet;  
b) number of this Uganda  Standard identity block comprising : width of the gutter or, in case of a fitting, 
the width of the appropriate gutter, in millimetres; material symbol (PVC -U). 
EXAMPLE  
Designat ion of an eaves gutter of PVC -U with a width of 150 mm:  DUS 2094:2019  
6 © UNBS 2019  – All rights reserved  
 Eaves gutter US  XX - 150 - PVC-U 
13 Marking  
13.1  The marking shall be printed or formed directly on the gutter or, if applicable, on the fitting in such a way 
that it does not initiate cracks or other  types of failure and that with normal storage, weathering and 
processing, and the permissible method of installation and use, legibility shall be durably maintained. 
Alternatively for fittings, the marking may be on a permanently attached label. If printi ng is used, the colour of 
the printed information shall differ from the basic colouring of the product.  
The marking shall be easily readable without magnification.  
13.2  The marking shall include at least the following details:  
a) name, which may be abbreviate d, or trade -mark of the manufacturer;  
b) upper opening width, in millimetres ;  
c) quality mark, if a certification scheme is set up;  
d) number of this Uganda  Standard.  
14 Fitness for purpose of gutter systems  
Gutter systems shall conform to the requirements given i n Table 3 when tested in accordance with the test 
methods and associated conditions given there.  DUS 2094:2019  
© UNBS 2019  – All rights reserved  7 
 Table 3 — Requirements for gutter systems  
Characteristics  Requirement  Test parameters  Test method  
 
 
 
 
 
 
 
 
 
 
 
Artificial ageing b) 
(type test)  
 
 
 
 
 
 
 
  Radiat ion energy  
Cycling and  
temperature  
regime  2.6 GJ/m2 
Method 1 of  
ISO 4665  Method A of  
ISO 4892 -2 
(Xenon Test)  
Artificial weathering  
Or a) 
Exposure time  
Cycle:  
—  Irradiation  
— Condensation  1600 h UVA 351 
lamp  
6 h at (50 ±2) °C  
2 h at (50 ±2) °C  ISO 4892 -3 
(QUV Test)  
Colour:  
The change of colour 
shall not exceed 
stage 3 of the grey 
scale according to  
ISO 105 -A02  ISO 105 -A02 
Tensile impact 
strength:  
50 % of the value 
before  
ageing (see Table 1)  Sample type  
Test temperature  According to Table 1  
(23 ±2) °C  Method A or  
ISO 8256  
Water tightness  
(type test)  No leakage  See Annex D  Annex D  Annex D 
a)   In case of dispute, the method EN ISO 4892 -2 (Xenon test) shall be used.  
b)   This test is a type test for each formulatio n and colour. It can be used for other products (e.g. for pipes  and fittings conforming to EN 
12200 -1). 
15 Production control  
Eaves gutters shall be controlled by the manufacturer during their production process at their place of 
production. This control  based on the appropriate sampling rules shall demonstrate the compliance of the 
products with the requirements of this standard.  DUS 2094:2019  
8 © UNBS 2019  – All rights reserved  
 Annex A  
(normative)  
 
Utilization of non -virgin material  
A.1 Material definitions  
A.1.1  Virgin material  
Material in a form su ch as granules or powder that has not been subjected to use or processing other than 
that required for its manufacture and to which no reprocessable or recyclable material has been added.  
A.1.2  Own reprocessable material  
Material prepared from rejected unu sed profiles or fittings, including trimmings from the production of profiles 
or fittings, that will be reprocessed in a manufacturer's plant after having been previously processed by the 
same manufacturer by a process such as moulding or extrusion, and fo r which the complete formulation is 
known.  
A.1.3  External reprocessable material  
Material comprising either one of the following forms:  
a) material from rejected unused profiles or fittings or trimmings therefrom, that will be reprocessed and 
that were ori ginally processed by another manufacturer;  
b) material from the production of unused PVC -U products other than profiles and fittings, regardless of 
where they are manufactured.  
A.1.4  Recyclable material  
Material comprising either of the following forms:  
a) material from used profiles or fittings which have been cleaned and crushed or ground;  
b) material from used PVC -U products other than profiles or fittings which have been cleaned and 
crushed or ground.  
A.2 Reprocessable and recyclable material  
NOTE  For t he purposes of this paragraph the term profiles means extruded profiles and any parts of a fabricated 
fitting which is made from an extruded profile. The term fitting means injection -moulded fittings and injection -moulded 
parts of a fabricated fitting.  
A.2.1 Own reprocessable material  
The use of clean own reprocessable material with agreed specification for the production of profiles and 
fittings is permitted without limitations.  
If fitting material is used for the production of profiles it shall be conside red as recyclable material.  
A.2.2  External reprocessable  and recyclable materials with agreed specification  
A.2.2.1  Material from PVC -U profiles and fittings  
External reprocessable and recyclable material with an agreed specification from PVC -U profiles an d fittings 
that are available in relevant quantities and intervals of time is permitted to be added to virgin or own 
reprocessable material or a mixture of those two materials for the production of profiles and fittings provided 
that all of the following c onditions are met.  
a) A specification for each material shall be agreed between the supplier of external reprocessable or 
recyclable material and the profile manufacturer plus, if applicable, a certification body. It shall at least DUS 2094:2019  
© UNBS 2019  – All rights reserved  9 
 cover the characteristics g iven in Table A.1. When determined in accordance with the test method 
given in Table A.1, the actual values for these characteristics shall conform to the agreed value, and 
the permitted deviations shall conform to those given in Table A.1. The quality pla n of the supplier of 
external reprocessable or recycla ble material should conform to U S ISO 9001.  
NOTE  For the purposes of A.2.2.1, the manufacturer is responsible for claiming and ensuring that the quality plan 
conforms to or is no less stringent than the  relevant requirements of US  ISO 9001: it is not essential for the manufacturer 
to be approved and registered fo r operation in accordance with U S ISO 9001.  
Table A.1 — Specification of characteristics to be covered by an agreement and the maximum 
permitted  deviations for these characteristics  
 
Characteristic  Permitted deviations  Test method  
PVC-content a) ± 4 % absolute by mass  EN 1905  
K-value a ± 3 units  ISO 13229  
Density a ± 20 kg/m3 ISO 1183 -3 
Vicat softening temperature (VST) a ± 2 °c ISO 306  
Particle size b) Requirements and test method shall be agreed and stated in  
the specification  
Type of stabilizer a b Requirements and test method shall be agreed and stated in  
the specification  
Impurities b Based on the source of material and the recycling  process a  
relevant test method and requirements shall be agreed and  
stated in the specification. Both the test method and the 
requirements shall be published  
a) If the source of the material are pipes and fittings produced under a recognized quality mark , it is not required to test this 
material's characteristics if the requirement covered by the quality mark conforms to the requirement given in this Table.  
b) The relevant requirements and test method are depending on the recycling process and on the end product.  
b) Each delivery sh ould be covered by a certificate according to 3.1.B of ISO 10474 , showing conformity to 
the agreed specification . 
c) The maximum quantity of external reprocessable and recyclable material that is intended to be added 
shall b e specified by the profile or fitting manufacturer.  
d) The quantity of external reprocessable and recyclable material that is actually added in each production 
series shall be recorded by the profile or fitting manufacturer.  
e) The PVC -content of the end p roduct shall conform to the requirements specified in 4.1.  
f) Type testing shall be carried out on the end product with the maximum specified amount of and with each 
form of external reprocessable or recyclable material with an agreed specification. Approv ed results shall 
be taken as proving conformity also of components containing lower levels of additions of external 
reprocessable or recyclable material.  
A.2.2.2  Material from other PVC -U products than profiles and fittings  
External reprocessable and recyc lable material with an agreed specification from PVC -U bottles or window 
frames that are available in relevant quantities and intervals of time is permitted to be added to virgin or own DUS 2094:2019  
10 © UNBS 2019  – All rights reserved  
 reprocessable material or a mixture of those two materials for the pro duction of profiles and fittings provided 
that all of the following conditions are met.  
a) The material shall conform to all of the conditions given in a) to f) of A.2.2.1, inclusive, and to all of the 
additional characteristics and requirements given in Tabl e A.2.  
Table A.2 — Requirements for external reprocessable and recyclable material from other PVC -U 
products than profiles and fittings  
Characteristic  Requirements  Test method  
PVC-content  80 %  EN 1905  
K-value  56 ≤ K-value ≤70 ISO 13229  
Density  1390 kg/m3 ≤ density ≤ 1500  kg/m3 ISO 1183 -3 
Vicat softening  
temperature (V ST) 62°C  ISO 306  
Impurities  ≤ 1500 ppm for particle size  ≥1000  pm 
≤ 1500 ppm for 1000  pm < particle size < 1400  pm a) 
Particle size  > 1000  pm: max 15 %  
< 1400  pm: 100 %   
Application source of  
the material  one source: bottles or window frames  
NOTE  If the source of the material is unused products for which the complete formulation is known and is such that 
all the requirements given in this table  are fulfilled the material does not have to be tested and does not have to meet the 
requirements for particle size  
a) Based on the source of material and the recycling process a relevant test method and requirements shall be agreed and stated in 
the speci fication. Both the test method and the requirements shall be published  
b) The material shall be clean and dry.  
c) The maximum allowed amount of reprocessable and recyclable materials shall depend on the difference 
in K-value of the virgin material and the  reprocessable and recyclable material as follows:  
i. if the difference in K -value, when determined in accordance with ISO 13229 , is ≤4 units, then up 
to 20 % by mass may be added;  
ii. if the difference in K -value is > 4 units, or not determined, then up to 5 % by mass may be 
added.  
d) The quantity of external reprocessable and recyclable materials that is actually added in each production 
series shall be recorded by the profile and fitting manufacturer.  
A.2.3  External reprocessable and recyclable material not covered by an agreed specification  
A.2.3.1  Material from PVC -U profiles and fittings  
External reprocessable and recyclable material n ot covered by an agreed specification from PVC -U profiles 
and fittings that are available in random quantities and intervals of time is permitted to be added to virgin or 
own reprocessable material or a mixture of those two materials for the production of profiles provided that all 
of the following conditions are met.  DUS 2094:2019  
© UNBS 2019  – All rights reserved  11 
 a) When this material is used the production shall be considered as at least one batch and shall be 
tested accordingly.  
b) The material shall be clean and dry.  
c) The maximum allowed amount of external  reprocessable and recyclable materials that may be added 
shall depend on the difference in K -value of the virgin material and the external reprocessable and 
recyclable material as follows:  
i) if the difference in K -value, when determined in accordance wit h ISO 13229 , is ≤ 4 units, then up 
to 10 % by mass may be added;  
ii) if the difference in K -value is >4 units, or not determined, then up to 5 % by mass may be added.  
d) The quantity of external reprocessable and recyclable materials that is actually added in  each 
production series shall be recorded by the profile manufacturer.  
A.2.3.2  Material from other PVC -U products than profiles and fittings  
External reprocessable and recyclable material not covered by an agreed specification from other PVC -U 
products tha n profiles and fittings shall not be used for the production of profiles and fittings conforming to this 
document.  DUS 2094:2019  
12 © UNBS 2019  – All rights reserved  
 Annex B  
(normative)  
 
Impact test  
The following impact test shall be carried out on each of three test pieces each not less than 900 mm in 
length. 
The test piece shall be conditioned in ice water for 1 h or in a refrigerator at ( 0±2) °C for 4 h. The test piece 
shall be mounted in two brackets ( 700±2) mm apart on a rigid support in such a way that the normal water line 
of its cross sectio n is vertical, as shown in Figure B.1.  
The pendulum shall be dropped on the test piece within 15 s of removal of the test piece from the iced -water 
or refrigerator.  
Dimensions in millimetres  
 - 
 
Key 
1 Axis 
2 Pendulum made of round steel  
3 Gutter  
Figur e B.1 — Arrangement for impact test  DUS 2094:2019  
© UNBS 2019  – All rights reserved  13 
 Annex C  
(normative)  
 
Heat reversion test for fittings  
The following test shall be carried out on three test pieces each comprising a complete fitting. Each test piece 
shall be placed in an oven, in a horizontal position,  free to expand, and maintained at (65 ± 2) °C for (30 ± 2) 
min. 
After the test pieces have cooled to room temperature, they shall be examined visually for any signs of 
deformation and surfaces defects that may have occurred.  DUS 2094:2019  
14 © UNBS 2019  – All rights reserved  
 Annex D  
(normative)  
 
Water tig htness test  
An assembly of a gutter system shall be arranged as shown in Figure D.1 and the slope shall be 3 mm/m. The 
distance between the centre lines of two successive brackets shall be 500 mm or as recommended by the 
manufacturer.  
The following test cy cle shall be carried out five times consecutively:  
a) hot water at (50 ± 2) °C shall be circulated for 15 min and  
b) cold water at (15 ± 2) °C shall be circulated for 10 min.  
c) each at a flow rate of 0.3 l/s (18 l/min).  
The gutter shall be partially blocked by an obstruction of half of the height of the gutter near the outlet to hold 
back the flow of the water. It shall have a drainage opening at the bottom to allow a flow of not more than 0.3 
l/s. 
 
 
Key 
1 Stop end  
2 Water feed  
3 Brackets  
4 Obstruction  
5 Stop end  
6 Outlet  DUS 2094:2019  
© UNBS 2019  – All rights reserved  15 
 7 Union clip or joint -bracket  
8 Angle  
Figure D.1 — Arrangement for water tightness test (horizontal projection)  DUS 2094:2019  
16 © UNBS 2019  – All rights reserved  
 Annex E  
(informative)  
 
Cross section areas  
 DUS 2094:2019  
© UNBS 2019  – All rights reserved  17 
 DUS 2094:2019  
18 © UNBS 2019  – All rights reserved  
 Bibliography  
KS 2198:2012,  Eaves gutters and fittings made of PVC -U — Definitions, requirements and testing  
 DUS 2094:2019  
© UNBS 2019  – All rights reserved  19 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNB S Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the rel evant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification m ark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bu reau of Standards.  
 
 DUS 2094:2019    
 
ICS 01.040.91; 91.060.20  
Price based on nn pages  
© UNBS 2019 – All rights reserved