Why Install A Backwater Valve


residential plumbing in TorontoAs a homeowner, you probably take great pride in the maintenance and upkeep of your home. You cut the lawn, get new windows, a roof when the time comes and update the interior to suit your tastes. Most owners now fully renovate their basements to be extra living or storage space. However, have you ever considered what you should be doing to protect your investment from the hazards of a flood?

With clients who have either experienced a flood or are looking to mitigate their risk, we always recommend installing a backwater valve. Its primary purpose is to prevent any sewage or wastewater from backing up into your home through the mainline.

Arrange a backwater valve install today to protect your home from the unnecessary backup of wastewater. Call the team at Trouble Shooters 416-291-9444.


What most homeowners don’t realize is that the flood or wastewater that comes back up the floor drain isn’t exactly clean water. In fact, it is the opposite. It is a combination of what your neighbors are flushing or draining through their pipes and collected rain water from the surround roads. Have a neighbor that does a lot of work on their car in the driveway? There could be grease and other chemicals in the adjoining sewer. Have a neighbor that cooks for a big family? There could be food remnants and grease decomposing down there.

The fact is that when this wastewater comes back up through the main line and out the floor drain in your basement, its hazardous. Even after it flows back down you now have to worry about the damage it has caused. There is not only the potential that it can ruin your furniture or decorations, it could also contaminate your drywall. Causing mold and other spores to grow. Left unchecked these things can cause major health problems.

how a backwater valve works

Quite simply a mainline backwater valve ONLY allows wastewater to flow in one direction, which is away from your house.

The structure of the valve includes a flap or gate that routinely closes when the direction of the flow reverses and tries to come back up the main line.  When the flow reverses, this flap stays in place protecting your home from the wastewater until the pressure against the flap releases. It can then reopen and resume regular flow. A backwater valve is typically installed inside the basement right at the exit point of the main sewer pipe.


The simple mechanics in these devices make for little to no repair costs. But this doesn’t mean you can ignore it forever. You should check in on it at least once a year, performing backwater valve maintenance when you notice the flap isn’t sealing properly or something seems amiss. If you are unsure what backwater valve maintenance you should be performing, make a call to a local plumber for a recommendation or your original backwater valve installer. Either will be able to help you sort out any issues fast.

At Trouble Shooters, our licensed technicians have extensive experience to install  backwater valve and also repair/ maintain these devices. We have been providing property owners in Scarborough and Toronto with superior service since 1944. Call us today to learn more about our expert service or to book a consultation regarding a backwater valve 416-291-9444.

Toronto water lines - rebates available

Install a backwater valve today to be part of the Rebate Program in Toronto

The City of Toronto, while working to make improvements to its vast sewer system, has a great rebate program for residents looking to upgrade their homes flood protection. The City of Toronto Basement Flooding Protection Subsidy Program offers financial subsidy of up to $3,400 per property to install flood protection devices.

This rebate applies to install a backwater valve on the sanitary sewage and/or storm water connection and/or installing a sump pump to manage the water normally collected by footing weeping tiles that drain to the sanitary/storm or combined sewer.

Eligible backwater valve work:

  • Installation/ install a backwater valve on main drain
  • Replacement of existing backwater valve
  • Installation of alarm for backwater valve

Available subsidy = 80% of the invoiced cost up to a maximum of $1,250 regardless of the number of devices installed at the property, including eligible labour, materials, permit and taxes. All work must be carried out by a plumber, licensed by the City. Learn more from the City here.


Contact Trouble Shooters for professional plumbing service in Toronto and Scarborough