17 Years Toronto PlumbingCSA B64.10 CertifiedWSIB & $2M CGLMax Subsidy Return
Combination Backwater Valve and Sump Pump Install in Toronto, ON | Licensed, Permitted & Rebate-Ready
· By The Backwater Valve Toronto Crew
Backwater Valve Installation Toronto installs backwater valve and sump pump combinations, the only route to the full $1,750 Toronto Basement Flooding Protection Subsidy. The valve stops sewage surging up from the street. The sealed sump basin and pump handle the groundwater your weeping tile collects, which in many older Toronto homes still drains straight into the sewer. A licensed plumber pulls the City of Toronto drain permit, installs and backflow-tests the valve, sets the basin and pump, and redirects your foundation drainage. ECRA/ESA trades wire the pump. We file both subsidy applications for you. In 17 years, this combo has kept the wettest basements we've seen dry.
Combo installs run $5,500-$9,500 per install before the rebate. We spec Mainline Backwater Valves, Mustee or Zurn models, with normally-open flapper or dual-flapper configurations depending on sewer lateral depth and risk tolerance. Every install includes drain permit coordination, backflow test certification, City inspection booking, and rebate paperwork across North York, Scarborough, Etobicoke, Toronto East, Toronto West and the rest of the GTA. Written 2-year workmanship warranty, WSIB coverage, $2M CGL.
$1,750Rebate
The Full $1,750 City Subsidy
$1,250 for the valve + $500 for the sump pump. Both applications filed for you.
The crew will call you shortly to book your free assessment.
17 Years of Toronto Backwater Valve Experience
Backflow Certified to CSA B64.10
WSIB Registered, $2M CGL
2,400+ Installs Completed
Engineering Specifications
What Goes Into a Backwater Valve and Sump Pump Combo
Four pieces work together. Each one has to be right for the other three to do their job.
Backwater Valve Install for the Combo
The backwater valve install for the combo follows our standard interior method, with one extra rule: the valve and the sump must never work against each other. We set a City-approved normally-open valve, usually a Mainline MBV, on the building drain after the last fixture. The weeping tile is cut off from that drain, so groundwater no longer reaches the valve. The sump discharge is routed outside, never into a pipe upstream of the closed flapper. We backflow-test the valve to CSA B64.10 before closing the pit and photograph the test for the subsidy file. The drain permit covers both the valve and the drainage changes, so you only need one City inspection for the plumbing side.
Sump Basin and Pump Selection
Sump basin and pump selection depends on how much water your foundation drain collects. We install a sealed, perforated basin, set in clear stone so groundwater can enter from the sides and bottom, with a gasketed lid that keeps out odours and debris. The pump is a submersible cast iron unit, such as a Zoeller M53 or a Liberty Pumps model, sized to the Toronto water table on your street and the length of the discharge run. A dual float switch gives a backup trigger if the main float sticks. We avoid plastic pedestal pumps because they wear out fast and run hot. Every basin is set level so the pump sits flat and cycles cleanly.
Discharge Routing and Weeping Tile Redirect
Discharge routing and weeping tile redirect are what stop groundwater from reaching the sewer in the first place. In many post-war Toronto homes, the foundation weeping tile ties straight into the sanitary drain. During a storm it adds water to an already full sewer, and with a valve installed, it would have nowhere to go. We cut that connection and run the weeping tile into the new sump basin. The pump then lifts the water up through a check valve and out through the wall to a freeze-proof exterior discharge, at least two metres from the foundation. This also helps you meet the City's downspout and foundation drain rules, which are part of qualifying for the $500 sump subsidy.
ECRA/ESA Electrical and Alarms
ECRA/ESA electrical and alarms are done by licensed trades, not improvised by a plumber with an extension cord. Every sump pump gets a dedicated circuit and a properly grounded outlet near the basin, installed under an ESA permit. We add a high-water alarm that sounds if the water rises above the pump-on level, so you know about a stuck float before the floor gets wet. A sump pump needs power, and a backwater valve doesn't, so power outages are the weak point of any combo. We talk through backup power options at the assessment based on how your street floods. The electrical sign-off is part of the paperwork the City asks to see.
5 Signs Your Home Needs Both a Backwater Valve and a Sump Pump
Water came in from the walls or floor, not just the drain. A backwater valve stops sewage. It does nothing for groundwater. If you’ve seen damp walls or seepage at the floor joint, you need the sump too.
Your weeping tile drains into the sewer. Common in Scarborough, North York and East York homes built before the 1980s. With a valve installed, that water has to go somewhere else.
You’re on a low lot or near a creek. Homes near Lake Ontario, the Humber, Highland Creek or the Don see a higher water table, especially in spring.
The neighbours’ sump pumps run all spring. If you can hear them, your foundation is sitting in the same groundwater.
You want the full subsidy. Only a combo qualifies for $1,750 from the City of Toronto rebate program. A valve alone tops out at $1,250.
In Our Opinion, the $5,500 Price Tag Looks Different After the $1,750 Subsidy
In our opinion, the sticker shock on a combo fades once you run the real numbers. A $5,800 install is about $4,050 after the City sends $1,750 back. A single interior backwater valve at $2,600 is about $1,350 after $1,250. The combo costs roughly $2,700 more out of pocket and protects you from a second source of water.
Compare that with a basement cleanup. Even a modest sewer or groundwater flood in a finished Toronto basement often costs tens of thousands to strip and rebuild, and a second claim can put your insurance at risk. If your home only has a sewer problem, the valve alone is the right answer, and we’ll say so. If it has both, doing half the job is the expensive choice. For homes with a large main drain, the combo works with a mainline backwater valve just as well.
Why Toronto Homeowners Trust Us
Why Choose Backwater Valve Toronto for Valve + Sump Combo?
Seventeen years and 2,400+ installs across North York, Scarborough, Etobicoke and central Toronto.
1 City Rebate Expertise
We file both subsidy parts, $1,250 for the valve and $500 for the sump, so the full $1,750 comes back.
2 Licensed Plumber + ECRA/ESA Electrical
A licensed Toronto plumber on the drains and licensed ECRA/ESA trades on the pump circuit.
3 Backflow Tested to CSA B64.10
The valve is tested under load before the pit closes, with photos for the City and your insurer.
4 Weeping Tile Redirected Properly
Foundation drainage cut from the sewer and run to the sump, the way the City program intends.
5 Cast Iron Pumps, Sealed Basins
No cheap pedestal pumps. Submersible cast iron units with dual floats and gasketed lids.
6 Written 2-Year Workmanship Warranty
Covers the valve, basin, pump install and discharge. Published CAD pricing from $5,500.
Zero Hassle Process
How Our Valve + Sump Combo Process Works
How The Backwater Valve Toronto Crew protects your basement and files your City rebate.
Step 1
In-Home Drain Assessment and Camera Scope
We inspect the main drain, find where the sewer lateral leaves the house, check slope, and confirm whether the pipe is clay, cast iron or PVC. We also confirm your subsidy eligibility. The visit and camera scope are free.
Step 2
City of Toronto Drain Permit
We apply to Toronto Building for the drain permit on your behalf before any concrete is cut. No permit means no subsidy, so we never skip this step.
Step 3
Interior Pit Excavation or Exterior Dig
Dust-shrouded saw cut inside, or a shored excavation at the property line outside. The valve is set on 3/4-inch clear stone bedding with cleanout access.
Some installers skip the backflow test, which voids both the warranty and the subsidy. We test every valve under load.
Step 4
Valve Installation, Backflow Test and Mitchell Harrington Quality Review
We backflow-test the new valve, record the results and photos, and founder Mitchell Harrington reviews the test documentation and CSA B64.10 compliance before the pit is closed.
Step 5
City Inspection and Rebate Submission
The City inspector signs off, then we file the Basement Flooding Protection Subsidy paperwork. The cheque typically arrives 6-8 weeks after submission.
Want a written price for valve + sump combo before you commit?
The assessment and camera scope are free. You see the CAD price in writing before any work starts.
Backwater Valve and Sump Pump Installation Cost in Toronto
A backwater valve and sump pump installation in Toronto costs $5,500-$9,500 CAD before the rebate. A home with an easy pit location, an existing exterior wall penetration and a short discharge run sits near $5,500. Long weeping tile redirects, deep pits in wet Leda clay and new electrical runs push it toward $9,500.
Because the combo qualifies for the full $1,750 City of Toronto subsidy, a $5,800 job comes in under $4,100 out of pocket. ECRA/ESA electrical, the drain permit, the inspection booking and both subsidy applications are in the quoted price.
What affects the price
How it moves your quote
Weeping tile redirect length
Longer runs to the basin take more digging.
Pump and basin size
Higher water tables need bigger pumps and basins.
Electrical run to the panel
A long run for the dedicated circuit adds cost.
Discharge route
New wall penetrations and long exterior runs add time.
Published Price
Valve + Sump Combo$5,500 - $9,500
per combo install, before rebate
Eligible for the FULL $1,750 City subsidy
✓Backwater valve plus sealed sump basin and submersible pump
✓Foundation drainage redirected to the sump
✓Freeze-protected exterior discharge with check valve
Group crew photos from real Toronto basements and property lines. Tap any photo to enlarge.
Customer Proof
What Customers Say About Our Valve + Sump Combo
★★★★★
"Valve, new sump basin and pump came to $7,800 and the City sent $1,750 back. The electrical was done properly under ESA and they filed both applications."
Farah N., Agincourt
Combo install $7,800 CAD
★★★★★
"Our weeping tile was still tied into the sewer. They redirected it to the new sump and installed the valve. First real downpour, not a drop came in."
Peter G., Long Branch
Combo install $8,900 CAD
Clear Answers
Valve + Sump Combo FAQs
How much does a backwater valve and sump pump install cost?
$5,500-$9,500 CAD before the rebate. The combo qualifies for the full $1,750 City subsidy, which brings a $5,800 job under $4,100 out of pocket.
What happens to the sump pump in a power outage?
The valve keeps working without power, but the pump does not. We discuss backup power and high-water alarms at the assessment.
Who does the electrical work for the sump pump?
Licensed trades under ECRA/ESA, on a dedicated circuit, as part of the same job.
Do you do combo installs in Scarborough?
Yes. Many Scarborough post-war bungalows have weeping tile tied into the sewer, which makes a combo the right fit, and our crews know the Leda clay backfill there.
Do I need a sump pump if I'm getting a backwater valve?
Not always. If your weeping tile is tied into the sewer or you get groundwater through the floor, yes. The camera scope shows us where your foundation drain goes.
How does the $500 sump subsidy work?
The City adds $500 on top of the $1,250 valve subsidy when a sump pump is installed and the foundation drain is disconnected from the sewer. We file both parts together.
Where does the sump pump water go?
Outside through a check valve to a freeze-proof discharge at least two metres from the foundation, never back into the sewer.
How long does a combo install take?
Usually two days on site: one for the valve and drain work, one for the basin, pump, discharge and electrical.
How loud is the sump pump?
Cast iron submersible pumps sit under water in a sealed basin, so you'll hear a short hum when they cycle and very little else.
Still have a question?
A licensed plumber can answer it on the phone or at your free assessment.
