(1) Non-potable water piping shall be identified by markings that are permanent, distinct and easily recognized.
(2) Non-potable water system for re-use purposes shall be marked in accordance with Section 12 of CAN/CSA-B128.1, “Design and Installation of Non-Potable Water Systems”.
(3) 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.