PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
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7.1.2.3.Water Distribution Systems
r1 (1) Except as provided in Section 7.7. and Sentences (2) and (3), water distribution systems shall be connected to a
public water main, drinking water system or a potable private water supply system.
(2) Storm sewage or greywater that is free of solids and treated to conform to Article 7.7.4.1. is permitted to be used as
a water supply for
(a) water closets,
(b) urinals,
(c) sub-surface irrigation, or
(d) the priming of traps.
(3) Rainwater that is free of solids and treated to conform to Article 7.7.4.1. is permitted to be used as a water supply
for
(a) clothes washers,
(b) laundry trays,
(c) mop sinks,
(d) bedpan washers,
(e) water closets,
(f) urinals,
(g) hose bibbs,
(h) sub-surface irrigation, or
(i) the priming of traps.
(4) Piping conveying the non-potable water described in Sentence (2) shall be installed in conformance with
Section 7.7.
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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.