Backwater valve installation in Toronto

A backwater valve lets wastewater out but blocks sewer water from coming back into your basement during heavy rain or a municipal sewer surge. It is the main protection against sewer backup.

• Toronto requires a building permit, and the valve must pass City inspection.
• The City's subsidy covers up to 80% of the invoice, to $1,600 per valve (maximum two valves).
• Consider an alarm so you know when the valve closes. While it is closed, water used in the house can back up in the basement.
• We assess your lines first so you get the right valve in the right spot.

See how much of this the City may cover.

Book a free assessmentCall 416-356-7886

Subsidy figures reflect the City of Toronto Basement Flooding Protection Subsidy Program. Eligibility, amounts and rules are set by the City and may change. Verify at toronto.ca/basementflooding.