04/27/2026
A flooded basement doesn’t always start inside your home.
In older neighbourhoods, the city’s sewer system can back up during heavy rain - and without the right protection, that water has nowhere to go but into your basement.
It’s one of those risks most homeowners don’t know about until they’re dealing with the damage. We just finished installing a backwater valve here in Oshawa. In this video, our tech Matt explains what it does, how it works, and why it matters - especially if your home is in an older part of town where the infrastructure is aging and the risk is higher.
A couple of things worth knowing:
A backwater valve is a one-way gate installed on your main sewer line. When the city’s system backs up, it closes automatically - blocking sewage from entering your home.
It also affects your home insurance. Many insurers offer reduced premiums or expanded coverage when a backwater valve is properly installed. That’s worth a conversation with your provider.
If you’re not sure whether your home has one - or whether you need one - that’s a straightforward question we can help you answer.
No pressure. Just clarity.