A backwater valve, or anti-return valve, stops sewage coming back from the city into the basement. It does not unclog a drain. If water comes up through the toilet or floor drain, we treat the clog first. Book emergency unclogging. Estimate over the phone.
House valve and normally open valve
The house valve sits on fixtures below street level: basement toilet, floor drain, washer. A normally open valve stays open while flow goes the right way, then closes if the sewer comes back. The City of Montreal describes the duty for new buildings since 2011, and after a backup, on its backflow stop valve page. Check the borough for the permit.
The valve does not replace unclogging
A stuck valve does not by itself explain a slow drain. Grease, paper, and roots stay in the line. We unclog. We camera if the line needs it. We hydrojet if the pipe holds. The valve protects against the municipal network. It does not clean your lateral.
Installation price
We do not sell valve installation as a HydroGo product. For an installation estimate, use a CMMTQ contractor. The City publishes RénoPlex aid examples on the same page. Those are not our rates. Our visit is flow and the cause of the backup.
If water is coming up now, call 514-700-6731 or book emergency unclogging.
