PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
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7.3.3.12.Copper Joints Used Underground
(1) Except as provided in Sentence (2), joints in copper tubes installed underground shall be made with either flared or
compression fittings, or be brazed using a brazing alloy within the American Welding Society's AWS-BCuP range.
(2) Compression fittings shall not be used underground under a building.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.