7.7.1.2.Identification and Marking

(0.1) Non-potable water piping shall be identified by markings that are permanent, distinct and easily recognized.

     (1) Non-potable water piping and outlets shall be identified and marked in accordance with CAN/CSA-B128.1, “Design
     and Installation of Non-Potable Water Systems.”

     (2) A sign containing the words NON-POTABLE WATER, DO NOT DRINK shall be in letters at least 25 mm high
     with a 5 mm stroke and posted immediately above a fixture that is permitted to receive non-potable water.

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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.