Backwater Valve Installation & Maintenance

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Backwater valves are designed to close the sewer line during periods of extreme rain to prevent water from entering your home. When the valve is closed you should not use any plumbing fixtures (i.e. toilets, sinks, dishwasher, washing machine) because water will not drain and will backup into your home.

Backwater valves should be installed by a licensed plumber and require a building permit to be installed. It is also critical that backwater valves are maintained and regularly inspected according to product specifications.

The City offers a subsidy of up to 80% of the invoiced cost, up to a maximum of $1,250 to help offset the cost of installing a backwater valve. Learn more about the Basement Flooding Protection Subsidy Program.