7.2.11.4. Required Check Valve (1) Where a water service pipe is supplied with water by more than one drinking-water system, a check valve shall be installed at each connection with a drinking-water system. (2) Where a fire service main is supplied with water by more than one source, a check valve shall be installed at each connection with a source of water. Table 7.2.11.2. Water Service Pipe and Fire Service Main Materials Forming Part of Sentence 7.2.11.2.(1)  Material

Standard

Limitations


Polyethylene pipe and fittings

certified to CAN/CSA-B137.1, “Polyethylene Pipe, Tubing and Fittings for Cold Water Pressure Services”

Pipe and fittings must have a rated working pressure of 1034 kPa or more. Can only be used in underground installations.


Cross-linked polyethylene pressure pipe or tube and fittings

certified to CAN/CSA-B137.5, “Cross-linked Polyethylene (PEX) Tubing Systems for Pressure Applications”

 


PVC pipe and fittings

certified to CAN/CSA-B137. 3, “Rigid Poly (Vinyl Chloride) (PVC) Pipe for Pressure Applications”, or certified to CAN/CSA-B137.2, “PVC Injection-Moulded Gasketed Fittings for Pressure Applications”

Pipe and fittings must have a rated working pressure of 1034 kPa or more


CPVC pipe and fittings

certified to CAN/CSA-B137.6, “CPVC Pipe, Tubing and Fittings for Hot and Cold Water Distribution Systems”

The design temperature and pressure shall conform to the requirements of the CSA B137.6, “CPVC Pipe, Tubing and Fittings for Hot and Cold Water Distribution Systems”


Polybutylene pipe and fittings

certified to CAN/CSA-B137.7, “Polybutylene (PB) Piping for Cold Water Distribution Systems”

Pipe must have an SDR of 11 or less


Cast iron water pipe

conform to ANSI/AWWA C151/A21.51, “Ductile-Iron Pipe, Centrifugally Cast in Metal Molds or Sand-Lined Molds, for Water or Other Liquids”

Pipe shall have a cement mortar lining conforming to ANSI/AWWA C104/A21.4, “Cement-Mortar Lining for Ductile-Iron and Gray-Iron Pipe and Fittings for Water”


Iron fittings for cast iron or ductile-iron water pipes

conform to ANSI/AWWA C110/A21.10, “Ductile-Iron and Gray-Iron Fittings, 3-in. Through 48 in., for Water and Other Liquids”

Pipe shall have a cement mortar lining conforming to ANSI/AWWA C104/A21.4, “Cement-Mortar Lining for Ductile-Iron and Gray-Iron Pipe and Fittings for Water”


Rubber gasket joints for cast iron and ductile-iron water pipes

conform to ANSI/AWWA C111/A21.11, “Rubber Gasket Joints for Ductile-Iron and Gray-Iron Pressure Pipe and Fittings”

 


Screwed cast iron water fittings

conform to ANSI B16.4, “Cast Iron Threaded Fittings (Classes 125 and 250)”

Screwed cast iron water fittings shall be cement-mortar lined or galvanized


Type K soft copper tube

certified to ASTM B88, “Seamless Copper Water Tube”

 


Solder-joint fittings for copper water systems

conform to ANSI B16.18, “Cast Copper Alloy Solder Joint Pressure Fittings”, or conform to ANSI B16.22, “Wrought Copper and Copper Alloy Solder Joint Pressure Fittings”

Solder-joint fittings not made by casting or the wrought process shall conform to the applicable requirements of ANSI B16.18, “Cast Copper Alloy Solder Joint Pressure Fittings”


Flared-joint fittings for copper water systems

conform to ANSI B16.26, “Cast Copper Alloy Fittings for Flared Copper Tubes”

Flared-joint fittings not made by casting shall conform to ANSI B16.26, “Cast Copper Alloy Fittings for Flared Copper Tubes”


PE/AL/PE pipe and fittings

certified to CAN/CSA B137.9, “Polyethylene/Aluminum/Polyethylene Composite Pressure Pipe Systems”

 


PEX/AL/PEX pipe and fittings

certified to CAN/CSA B137.10, “Crosslinked Polyethylene/ Aluminum/Crosslinked Polyethylene Composite Pressure Pipe Systems”

 


Column 1

2

3 Section7.3.Piping 7.3.1.Application