The Ontario Building Code | Crosslinked Polyethylene Pipe and Fittings
7.2.5.7. Crosslinked Polyethylene pipe and Fittings
(1) Cross-linked polyethylene pipe and its associated fittings used in hot and cold potable watersystems shall be certified to CAN/CSA-B137.5, "Crosslinked Polyethylene (PEX) Tubing Systems for pressure Applications".
In Plain Language
Cross-linked polyethylene (PEX) pipe and its associated fittings must meet specific material and certification requirements, covering this increasingly common flexible plastic plumbing material.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.