Ontario Plumbing Question

In Ontario are back flow proventers required in ALL new basement bathrooms? Thank You!



See post#8 Protection from Backflow
**(1) **Except as permitted in Sentence (2), a *backwater valve *that would prevent free circulation of air shall not be installed in a *building drain *or in a building sewer.
**(2) **A *backwater valve *may be installed in a *building drain *provided that,
(a) it is a “normally open” design conforming to,
(i) CAN/CSA-B70, “Cast Iron Soil Pipe, Fittings, and Means of Joining”,
(ii) CAN/CSA-B181.1, “ABS Drain, Waste, and Vent Pipe and Pipe Fittings”,
(iii) CAN/CSA-B 181.2, “PVC Drain, Waste, and Vent Pipe and Pipe Fittings”, or
(iv) CAN/CSA-B182.1, “Plastic Drain and Sewer Pipe and Pipe Fittings”, and
(b) it does not serve more than one dwelling unit.
**(3) **Except as provided in Sentences (4) and (5), where a *building drain *or a *branch *may be subject to backflow, a *backwater valve *shall be installed on every *fixture drain *connected to them when the *fixture *is located below the level of the adjoining street.
**(4) **Where more than one *fixture *is located on a *storey *and all are connected to the same branch, the *backwater valve *may be installed on the branch.
**(5) **A *subsoil drainage pipe *that drains into a *sanitary drainage system *that is subject to surcharge shall be connected in such a manner that *sewage *cannot back up into the *subsoil *drainage pipe.

Thank You!