Backwater valves play an important role in helping protect homes from basement flooding. To ensure they work effectively, they should be checked every three months—or before significant rain events—to make sure they are clear of debris and operating properly. Regular maintenance can make a meaningful difference during heavy rainfall.
Each year, Hamilton Water sends the attached letter to addresses in our system recorded as having backwater valves installed. This year’s mailing will include close to 12,000 properties. As part of Hamilton Water’s ongoing efforts to help residents stay prepared, the outreach also includes print and online ads and posts on social media, ensuring homeowners receive clear, detailed guidance. The letter highlights the importance of maintenance and provides instructions for the two types of backwater valves commonly used in Hamilton.
Through the Protective Plumbing Program, eligible homeowners may receive funding to complete flood protection upgrades such as installing a backwater valve, which helps keep basements dry by preventing potential sewer backups. The program also supports disconnecting downspouts from stormwater or combined sewer systems. Disconnecting a downspout redirects rainwater away from the storm or combined sewer system, reducing strain on the system and lowering the risk of basement flooding.
To learn more about backwater valves, downspout disconnection, and other protective plumbing devices, visit hamilton.ca/backwatervalves.
Brad Clark Report 
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