Einwechter Plumbing & Heating

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Backwater Valve Installation in HaltonBackwater valve installationWith Halton paying half.

Backwater valve installation in Halton keeps sewer water from backing up into your basement in a heavy storm. It is $2,600 plus HST installed, and Halton Region pays 50% of it, up to $1,600, in Burlington, Oakville, Milton and Halton Hills.

Backwater valve, installed $2,600 Camera, locate, cut the concrete, dig, install, tie in and re-pour. Plus HST.

Halton Region pays 50%, up to $1,600
The written report Halton needs, before any work starts
Help with your subsidy application

Book a Time Call 548-255-2662Call 548-255-2662

Burlington, Oakville, Milton, Georgetown, Acton and the rest of Halton Hills

Backwater valve cost in Halton

Two prices,and Halton pays half.

Halton’s subsidy needs a plumber’s assessment before the valve goes in. The assessment is not added to your price: it comes off the valve.

Step 1, for the subsidy

$600 + HST

Plumbing and drainage assessment

A site assessment, camera inspection and drain locating, a written report for Halton, a written estimate, and help with your application. Not added to your price: credited in full toward the valve when it’s installed within 90 days.

Step 2

$2,600 + HST

Backwater valve, installed

Camera inspection of the main drain, locating it under the floor, cutting and digging, the valve and tie-in, and new concrete with an access lid. Halton pays 50%, up to $1,600.

Not applying for the subsidy? You don’t need the assessment. The valve is $2,600 plus HST installed. More about how the valve works on our backwater valve installation page.

Halton Region

Backwater Valve Installation Subsidy

50%, up to $1,600

Homes on Halton’s sewer system
The valve goes inside the house
Weeping tile must be off the sewer
Claim within one year, once per property

Halton subsidy

What Halton asks for,and what we handle.

Halton Region pays half the cost of a backwater valve, up to $1,600, through its Backwater Valve Installation Subsidy. Checked October 2026.

Before the workProof that no rainwater from downspouts, weeping tiles or sump pumps drains into your sewer, or that it will be disconnected. Our assessment and written report cover this.
After the workAn itemized, paid invoice that shows the camera inspection and assessment. We supply it.
The applicationSend it within one year of the work. We help you put it together.

Is your weeping tile tied into the sewer? Halton pays for weeping tile disconnection too, at 100% up to $6,500, and one assessment covers both jobs. Every program in our area is on our plumbing and water rebates page.

How we install it

A one-way dooron your main drain.

A backwater valve lets water leave the house as normal. When the sewer backs up in a storm, a flap closes and keeps the sewer water out, then opens again once the level drops.

1Camera and locateWe run a camera down the main drain, check its condition, and mark exactly where it runs under your floor.
2Open the floorWe saw-cut the concrete over the drain and dig down to it, keeping the dust and mess contained.
3Set the valveThe valve is levelled on a stone bed and tied into the main drain.
4Close it upWe re-pour the floor and leave an access lid, so the valve can be checked and cleaned.

The technical version: a normally open backwater valve (a check valve with a flap) on the building drain stops sewage surcharge from flowing back into basement fixtures and floor drains.

Basement concrete floor saw-cut open to reach the main drain — Floor cut open over the drain.

Main drain dug out under a basement floor — Main drain dug out.

Backwater valve set on a stone bed in the main drain — Valve set on a stone bed.

Finished concrete floor with a backwater valve access lid — Floor re-poured with the lid.

Backwater valves across Halton

Burlington, Oakville,Milton and Halton Hills.

Halton Region runs the sewers for all four municipalities, so the same subsidy and the same rules apply in each one.

Burlington

Backwater valve installation in Burlington. Heavy storms in July 2024 flooded basements across the city, and a backwater valve is one of the main defences against sewer backup.

Oakville

Backwater valve installation in Oakville, with the same Halton Region subsidy: 50% of the cost, up to $1,600.

Milton

Backwater valve installation in Milton, from older homes near downtown to newer subdivisions. The assessment tells you what your house needs.

Georgetown and Acton

Backwater valve installation in Georgetown, Acton and the rest of Halton Hills. Homes on Halton’s sewer qualify; homes on septic don’t.

Locally owned since 2018

Why homeownerschoose Einwechter

The price comes firstYou approve the price in writing before the work begins. No surprises at invoice time.
The paperwork, done rightThe report, the invoice and the photos Halton asks for, so your application goes in complete.
Brands we stand behindWe guarantee our work for a year when we supply the equipment. We pick brands we trust, and that’s what lets us stand behind them.
Licensed and insuredA licensed plumbing contractor, fully insured: $5 million liability, plus WSIB (workplace insurance).

Backwater valve access lid in a patched basement floor

Questions we get asked

Halton backwater valve FAQ

How much does a backwater valve cost in Halton?

A backwater valve is $2,600 plus HST installed. Halton Region pays 50% of the cost, up to $1,600, once the work is done and your application is in.

Is the $600 assessment added to the price?

No. The $600 assessment is credited in full toward your backwater valve when the valve is installed within 90 days. You only need it if you’re applying for Halton’s subsidy.

Why does Halton need an assessment first?

Halton wants rainwater kept out of the sewer. Before the valve goes in, it needs proof that your downspouts, weeping tiles and sump pump don’t drain into the sewer, or that they will be disconnected. Our written report covers that. Some older Halton homes can also get a free drainage survey from the Region.

What if my weeping tile is connected to the sewer?

Then it has to come off the sewer for the backwater valve subsidy. Halton pays 100% of that work, up to $6,500, through a separate subsidy, and one assessment covers both jobs. See our weeping tile disconnection in Halton page for prices.

Do you install backwater valves in Burlington and Oakville?

Yes. We install backwater valves across Halton: Burlington, Oakville, Milton, Georgetown, Acton and the rest of Halton Hills.

Does a backwater valve need maintenance?

Check it once a year. Open the access lid and make sure the flap moves freely and nothing is caught in it.

Can I use water while the valve is closed?

Keep it to a minimum. While the flap is shut, water from your own sinks, toilets and laundry can’t leave the house either. Once the sewer level drops, it opens and everything drains normally.

Halton Backwater Valves

Stop the next storm at the drain.

In Burlington, Oakville, Milton or Halton Hills? Book a time. You get the price in writing and help with Halton’s subsidy.

Book a Time Call 548-255-2662Call 548-255-2662

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