B-1.1, r. 3 - Safety Code

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167. Nonmetallic piping must meet the requirements of CAN/ULC-S660, Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids, published by the Underwriters’ Laboratories of Canada. The piping must also be installed so that there are no joints in the ground.
O.C. 221-2007, s. 1; 88-2018O.C. 88-2018, s. 16.
167. Nonmetallic piping must meet the requirements of any of standards ULC/ORD-C107.7-1993 Glass-Fibre Reinforced Plastic Pipe and Fittings for Flammable and Combustible Liquids, ULC/ORD-C107.4-1992 Ducted Flexible Underground Piping Systems for Flammable and Combustible Liquids and ULC/ORD-C971-2005 Nonmetallic Underground Piping for Flammable and Combustible Liquids, published by Underwriters’ Laboratories of Canada. Piping that meets the requirements of ULC/ORD Standard C971-2005 Nonmetallic Underground Piping for Flammable and Combustible Liquids must also be installed so that there are no joints in the ground.
O.C. 221-2007, s. 1.