Indirect Connections
(1) Where a fixture or device is indirectly connected, the connections shall be made by terminating the fixture drain above the flood level rim of a directly connected fixture to form an air break.
(2) The size of the air break shall be at least 25 mm.
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Article 7.3.3.11. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only
