How much does it cost to install a check valve?

When a sewer backup occurs, the consequences can be disastrous: loss of property, lingering odors, mold, and sometimes even months of renovations. However, there is a simple, affordable, and effective solution to prevent damage: install a check valve.

But how much will it cost to install a check valve in 2025? Here’s a quick guide to help you better understand why this investment is essential!

Cost of installing a check valve: what factors influence the cost?

The cost of installing a backflow preventer (or check valve) can vary considerably depending on several factors. Here’s what can increase the final bill:

The type of valve chosen

There are different models: manual, float, and automatic. Automatic valves are more expensive, but also more efficient and safer in the long run. The choice often depends on your plumbing type and your budget.

Access to the pipes

If the plumber can easily access your pipes, the job will be quick and easy. But if he has to break up a concrete slab to reach the main pipe, the cost will increase considerably. In some cases, a preliminary inspection with a camera is required (around $150 to $300).

The region where you live

Prices for backwater valve installation can also vary depending on where you live. In urban areas like Montreal, plumbers’ rates are often slightly higher than in rural areas, where labor costs are sometimes more affordable.

Available grants

Several municipalities in Quebec offer reimbursement programs—sometimes up to 80% of the total cost!

In short, depending on the nature and scope of the work required, the cost of installing a backwater valve generally ranges from $400 to $2,000, depending on the case.

Installing a check valve: what is the procedure?

It sounds simple, but installing a backwater valve requires skill and precision. You should start with an inspection of the pipes, sometimes using a camera. The plumber then locates the correct location, shuts off the water supply, and then excavates (often breaking up concrete).

The stages of the work:

• Initial inspection (visual or with camera)
• Identification of the targeted pipe
• Breakup of the concrete slab, if necessary
• Installation and testing of the check valve
• Backfilling and sealing of the soil

The job lasts on average 4 to 6 hours. The benefits of a job well done? Reliable and long-lasting protection against sewer backups and wastewater infiltration.

Note: the valve must comply with current standards for your insurance company to recognize the installation. That’s why it’s important to hire a certified professional!

Installing a backwater valve: do you need a permit?

Before installing a backwater valve, be sure to check your municipality’s requirements. In many cities, a permit is required, especially if excavation work is planned. The goal: to ensure an installation that complies with regulations.

What you need to know:

• Some cities require a permit application form.
• Standards such as BNQ 3680-600 must be respected.
• Installation must be carried out by a certified contractor.
• If non-compliant, your insurance claim may be denied.

…A quick call to your city’s planning department can save you a lot of trouble!

Who should you entrust with the work? The importance of choosing a certified professional

An RBQ-certified plumber guarantees a safe, durable installation that complies with current standards. Avoid improvised installations: a faulty connection or a poorly oriented valve can compromise the safety of your home… and your insurance claim. Before hiring anyone, be sure to ask these essential questions:

• Do you have an RBQ license?
• Is the permit included in your application process?
• Do you offer a warranty on the work completed?

Need a good price for installing a check valve?

Protect your home from sewer backups with professional installation. Plomberie Urgence Montréal, recommended by CAA-Québec, offers fast and reliable 24/7 service in Montreal, Laval, and the North Shore. Contact us for a free quote!

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