In Plain Language

A drinking water treatment system or device must be certified to the referenced CAN/CSA standard for drinking water treatment systems, ensuring these devices reliably improve rather than compromise water quality.

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.