The Ontario Building Code | Combustible Plumbing Fixtures
3.1.5.17. Combustible Plumbing Fixtures
(1) Combustible plumbing fixtures are permitted in a building required to be of noncombustible construction if they are constructed of material having a flame-spread ratingand smoke developed classification permitted in Subsection 3.1.13.
In Plain Language
Combustible plumbing fixtures are allowed in noncombustible-construction buildings provided they're made of material meeting the flame-spread rating and smoke-developed classification limits set out in Subsection 3.1.13.
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.