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Plumbing service · Kawartha Lakes

Backwater Valve Installation and Service

Household wastewater is supposed to leave the building through the drainage system and continue away from the property. Under certain sewer conditions, flow can try to move in the opposite direction. A backwater valve is designed to close when that reverse flow occurs, helping prevent wastewater from entering the house through lower fixtures. The concept is simple, but the valve needs to be installed in the correct location for the plumbing system. It is not a universal answer to every basement water problem because sump-pump water, foundation drainage and sanitary sewer backups involve different systems.

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Does Your Home Need a Backwater Valve?

Whether a valve is appropriate depends on the way the building drain and sewer connection are configured. Existing plumbing also matters because the valve has to protect the relevant fixtures while still allowing wastewater to leave normally.

This is something that should be considered based on the actual property rather than installed simply because another home nearby has one.

Existing Backwater Valves Need Access

A backwater valve contains moving parts and can collect debris. Homeowners should know where the valve is located and ensure its access cover remains reachable. Finishing a basement over the access point can make inspection and maintenance unnecessarily difficult.

Questions homeowners ask

Backwater Valves FAQs

What does a backwater valve do?

It allows wastewater to leave the house normally but is designed to close if flow reverses toward the building.

Will a backwater valve stop groundwater from entering my basement?

No. It addresses sewer backflow, not groundwater or foundation leaks.

Does every house need one?

No. Suitability depends on the drainage system and sewer connection.

Does a backwater valve require maintenance?

It should remain accessible for inspection and cleaning because debris can interfere with movement.

Is a backwater valve the same as a check valve on a sump pump?

No. They serve different systems and different purposes.

Wondering Whether a Backwater Valve Makes Sense?

Tell us about the drainage problem you’re trying to prevent or the valve already installed in your home. We can look at how the system is set up and whether the valve needs service or further attention.

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