The Ontario Building Code | Corrosion-Resistant Coating
9.31.6.3. Corrosion-Resistant Coating
(1) Where storage tanks for service water heaters are steel, they shall be coated with zinc, vitreous enamel (glass lined), hydraulic cement or other corrosion-resistant material.
In Plain Language
Water heating equipment needs a corrosion-resistant coating where set out in this article, protecting components exposed to moisture.
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.