The Ontario Building Code | Solder and Fluxes
7.2.9.2. Solder and Fluxes
(1) Solders for solder joint fittings shall conform to ASTM B32, "Solder Metal" in accordance with the recommended use.
(2) Solders and fluxes having a lead content in excess of 0.2 per cent shall not be used in a potable water system.
(3) Fluxes for soldered joints shall conform to ASTM B813, "Liquid and Paste Fluxes for Soldering of copper and copper Alloy tube".
(4) Brazing alloys shall conform to ANSI/AWS A5.8M/A5.8, "Specification for Filler Metals for Brazing and Brazed Welding", BCuP range.
7.2.10. Miscellaneous Materials
In Plain Language
Solders for solder-joint fittings must conform to ASTM B32 according to their recommended use, and solders and fluxes with lead content above a strict threshold face additional use restrictions protecting drinking 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.