The Ontario Building Code | Outlets
7.7.3.2. outlets
(1) Except as permitted in Sentence 7.1.5.3.(3), an outlet from a non-potable water system shall not be located where it can discharge into,
(a) a sink or lavatory,
(b) a fixtureinto which an outlet from a potable water system is discharged, or
(c) a fixturethat is used for a purpose related to the preparation, handling or dispensing of food, drink or products that are intended for human consumption.
7.7.4. Non-Potable water Systems for Re-use Purposes