PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
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7.3.6.7.Ball Tests
(1) Where a ball test is made, a hard ball dense enough not to float shall be rolled through the pipe.
(2) The diameter of the ball shall be not less than
(a) 50 mm where the size of the pipe is NPS 3 or more, or
(b) 25 mm where the size of the pipe is less than NPS 3.
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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.