Toronto plumbing subsidy Mainline backwater valve

Backwater Valve Installation in Toronto – Mister Plumber

Your worst nightmare as a homeowner is a flooded basement.

Even worse? It’s flooding with sewer backflow. That could be thousands of dollars in damages, serious health hazards, and a wet, stinky, wasted day – maybe week.


You can prevent this mess with a backwater valve installation from Mister Plumber in Toronto.

What’s a backwater valve?

Backwater valves are placed at the lowest point of your sewer line and act as a one-way gate, only allowing water to flow out – not in.

If you live in an older home or in an area prone to flooding, a backwater valve is an essential piece of equipment to prevent flooding and costly damage.

Fullport Mainline backwater valve

When do I need a backwater valve?

The backwater valve protects fixtures and drainage openings below grade, like in a basement, where the sewage or stormwater systems might become overloaded, causing wastewater to backflow. Any subsoil drainage pipe that connects to the sanitary drain also needs a backwater valve.

Backwater can enter your home through basement floor drains, water closets, sinks, laundry standpipes, and sump pits. You should consider a backwater valve installation in Toronto if:

  • Your home is more than 30 years old
  • You live in an area with a high water table or at risk of flooding
  • There has been Sewer Backup in your neighborhood
  • Your home has experienced a sewer backup

If any of these apply to you, it’s time to give Mister Plumber a call. We will assess your home and let you know if a backwater valve installation is right for you.

Reduce the risk of basement flooding: Say Hello to the Fullport Backwater Valve

The Mainline #4963 FullPort Backwater Valve has revolutionized sewer protection across North America (since 1997!) with its patented ‘normally open’ gate design.

backwater valve installation toronto mississauga gta plumber

Mister Plumber has proudly installed the valve in hundreds of basements, cellars, crawl spaces, and other areas for Toronto homeowners because of its convenient benefits:

  • The ‘open gate’ design enables the sewer system to vent any gases caused by positive or negative pressure within the pipes.
  • The Built-in ‘Clear View’ top makes inspection of the valve quick and simple for the building owner or plumber.
  • The 4963 valve also comes with an integral clean-out for rodding the sewer lateral. Should rodding from the stack be necessary, the snake can easily pass over the open gate and be retracted without doing any harm to the components.

How long does installation take? (The process)

The timeline for your backwater valve installation depends on a case-by-case basis. But typically, you can expect it to take anywhere between 4-8 hours. Here’s what to expect:Plumber Backwater valve installation in Toronto GTA

  1. The inspection – One of our plumbers will come to your home or business to assess the situation. You should note that there will probably be more than one visit.
  2. Building permits – Before installing a backwater valve, you’ll need a permit from your municipality. You can also check a list of approved plumbing specialists in Toronto for backwater valve installation, like Mister Plumber.
  3. Setup and installation – Once the permits have been approved, our team will schedule a time to come and install the backwater valve. This process usually takes between 4-8 hours. We’ll disconnect foundation drains with the help of sump pits and pumps before installing the backwater valves to ensure a clean workflow.
  4. Aftercare – After installation, our team will test the backwater valve to make sure it’s working properly. They will also go over some maintenance tips with you to ensure it has a long lifespan.

Toronto-Backwater valve installation outsideIf you’re concerned about a possible flood in your home or business, don’t wait – call Mister Plumber at 416-939-1530 today and ask about our backwater valve installation services. We’re always here to help!


Yes. As fully licensed, and insured Toronto plumbers we are qualified to help you claim your City of Toronto flood prevention rebate. We have installed many backwater valves in Toronto and fully document the process to help you expedite your flood prevention rebate claim.

Get your backwater valve installed today by Mister Plumber

If you’re concerned about a possible flood in your home or business, don’t wait – call Mister Plumber at 416-939-1530 today and ask about our backwater valve installation services. We’re always here to help!

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 by Michael

Master plumber was excellent!