7.4.2.2.Connection of Overflows from Rainwater Tanks

(1) Where an overflow from a rainwater tank is connected to a storm drainage system, it shall be connected by
     (a) an air break, or
     (b) a backwater valve installed on the storm drainage pipe before the connection to the storm building drain.

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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.