Backwater Valve Installation Plumbing Services

Plumbing services backwater valve installation

Basement flooding can sometimes be cause by city sewer lines backing up into your home. These backups not only cause damage that is difficult and costly to repair, but they also create health hazards. A good way to protect against sewage backups is to install backwater backflow valves, which are designed to block flow of city water into the house.

Benefits of a Drain Backwater Valve

A backwater valve, also known as a check valve or backflow prevention valve, is a method used to shut off possible sewage backup into your basement. It is a one-way valve that allows wastewater to flow out of your home to the sewer system but not the other way around.

Most often, the valve prevents, eliminates, or restricts sewage and wastewater from leaving the home, but when sewage starts to enter the house, the valve is alerted and will automatically block the flow of sewage to enter the home. This would even prevent the use of plumbing fixtures such as toilets, sinks, because the valve is closed.


All backwater valves work safely and effectively when set up correctly. Without the correct setup and timely checkups, a backwater valve will not be effective.

A backwater valve can be a lifesaver when you are facing a sewage problem. It is also called a backflow valve and has been designed to stop your sewer from overflowing and flooding your home or building. There are different types of backwater valves that provide different levels of protection. However, the most common has a flap on the back of the valve that allows water to flow out from your property. If the water is starting to back up in the pipes and trying to flow into your home or building, the valve will sense it and the flap will close, stopping a potential flooding disaster.


Good maintenance of a backwater valve is an important part of keeping your home and property safe from flooding. A backwater valve helps to prevent sewage from backing up into your home, acting as a one-way check valve that allows water to flow out but not in. To ensure your backwater valve is functioning properly, it should be inspected and maintained regularly.

Periodic inspections are the best way to ensure the proper operation of a backwater valve. The valves should be checked for debris build-up, cracks in the seal, loose parts or hoses, and any other signs of wear or damage. If any issues are discovered they should be addressed immediately with professional help.


Open Backwater Valve

  • Open Backwater Valve: The flap of this backwater valve is normally opened. When the sewage is backed up, the valve is lifted to close the passage to the backflowing water preventing it from going further into the home or building.

Closed Backwater Valve

  • Closed Baackwater Valve: The flap on this backwater valve is in the closed position. When sewage is discharged into the sewer, the flap opens up to allow it to pass. However, if the sewer backflows from the city to the home or building, the pressurized water will abut the flap in the closed position.
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Montreal 5 Star Plumbing can quote, install and inspect back water valves / Backflow valves, provide you with all information for backwater valve installation or evaluation.

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