The Ontario Building Code | Copper and Brass Pipe
7.2.7.1. copper and Brass pipe
(1) copper pipe shall conform to ASTM B42, "Seamless copper Pipe, Standard Sizes".
(2) Brass pipe shall conform to ASTM B43, "Seamless Red Brass pipe, Standard Sizes".
In Plain Language
Copper pipe must conform to ASTM B42 for seamless copper pipe, and brass pipe must conform to ASTM B43 for seamless red brass pipe, setting material standards for these traditional non-ferrous piping options.
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.