Backflow prevention in London, Ontario
Keep your water flowing in the right direction
Backflow can let water from plumbing systems or connected equipment flow in the wrong direction, creating a risk of contaminants entering the drinking water supply. Donaldson Home Services installs, repairs and replaces backflow preventers for properties in London and surrounding communities, with upfront pricing before any work begins.
Why is backflow prevention important?
Backflow happens when water flows in the opposite direction from its intended path, potentially allowing water from connected plumbing systems or equipment to enter the drinking water supply.
A properly selected and installed backflow preventer helps stop that reverse flow, protecting the potable water system and helping your property meet applicable plumbing and municipal requirements.
Backflow prevention helps:
Not sure what type of backflow protection your property needs? Donaldson can assess your plumbing and recommend the appropriate solution.
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Professional backflow prevention, done right
The right backflow protection depends on your plumbing system, the connection being protected and the level of risk involved. Donaldson’s licensed plumbers can assess what’s required and complete the work properly.
We’ll explain what your plumbing requires and the work involved before getting started. Backflow prevention is part of our plumbing services; if you’re adding plumbing as part of a remodel or addition, see renovation plumbing, and for water quality inside the home, see water treatment. We serve properties in London and surrounding communities.
What to expect
Whether you need a new backflow preventer or work on an existing device, we’ll make the process straightforward from assessment to completion.
Step one
Reach out
Call us now, fill out the form or schedule an appointment online and tell us what you need. If you’ve received a notice, report or other documentation outlining backflow requirements for your property, have it available so we can better understand the work involved and arrange the appropriate service.
Step two
Assess plumbing
A Donaldson plumber will review the relevant plumbing, existing backflow equipment and the connection that needs to be protected. We’ll determine what type of backflow prevention is appropriate based on the application, existing setup and applicable requirements.
Step three
Review
We’ll explain what we found, the type of backflow preventer required and any installation, repair or replacement work involved. We’ll answer your questions and provide clear, upfront pricing so you understand the recommended work before moving forward.
Step four
Complete work
Once you’ve approved the work, a licensed Donaldson plumber will complete the backflow preventer installation, repair or replacement. We’ll make sure the device is properly installed and connected and explain any next steps or testing requirements that apply to your system.
Does your backflow preventer need annual testing?
Certain testable backflow prevention devices in London must be tested when installed and once every year thereafter. Testing is also required after certain repairs, cleaning, relocation or other work on the device.
Testing must be completed by a backflow prevention device tester registered with the City of London.
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We give you the full price before any work begins, and what you’re quoted is what you pay. No hidden fees or unexpected invoice charges.
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How does backflow prevention work?
Water normally moves through your plumbing in one direction. When pressure changes cause that flow to reverse, water from another part of the plumbing system can potentially move back toward the potable water supply. This is known as backflow.
A backflow preventer creates a barrier at an appropriate point in the plumbing system to help stop that reverse flow.
What causes backflow?
Backflow can occur when pressure changes within a plumbing system cause water to move in the opposite direction. This can happen through backpressure or backsiphonage.
What is a cross-connection?
A cross-connection is a point where the drinking water system connects with another water source or substance. Depending on the connection and level of risk, backflow protection may be required.
What does a backflow preventer do?
A backflow preventer allows water to move in its intended direction while helping prevent it from reversing through a protected connection.
Are there different types of backflow preventers?
Yes. Different devices are designed for different plumbing applications and levels of risk. The appropriate device depends on the connection being protected and applicable plumbing requirements.
Why does professional installation matter?
Backflow prevention needs to be appropriate for the specific plumbing connection and installed correctly. A licensed plumber can assess the application and complete the installation according to applicable requirements.
Not sure what type of backflow prevention your property requires? Donaldson can assess your plumbing and explain the appropriate next step.
Serving London, Ontario and surrounding areas
Locally based, with technicians across Southwestern Ontario. Don’t see your town? Give us a shout. Chances are we’re nearby.
Schedule a 2-hour arrival window for any home heating, air conditioning, or plumbing service. You’ll receive a text when we’re on the way, plus a photo of your technician so you know exactly who’s coming. Book now and experience service you can trust.
Backflow prevention FAQs
Have more questions? We’ve got the answers.
It depends on your property and the plumbing connections involved. Backflow protection is required in certain situations to protect the drinking water supply from cross-connections. If you’ve been told you need a device, or you’re unsure what applies to your plumbing, Donaldson can assess the requirements and explain them. Book an assessment.
Visible leaks, damage or problems found during testing can mean a device needs attention. Whether it can be repaired or should be replaced depends on the device, its condition and the issue. Our licensed plumbers assess it, explain the options and give you upfront pricing before any work begins. Book a backflow repair.
Certain testable backflow prevention devices in London require annual testing. Testing must be completed by a tester registered with the City of London.
Testing of applicable backflow prevention devices must be performed by a tester registered with the City of London.
New testable backflow prevention device installations in London require a plumbing permit. Changing the type, size or location of an existing testable device may also require a permit.
Depending on the device and the problem, repair may be possible. A licensed plumber can assess the device and tell you whether repair or replacement is the right fix, and devices often need to be retested after repair work. You’ll get upfront pricing before any work begins. Book a backflow repair.
Cost depends on the type and size of backflow preventer required, the existing plumbing, accessibility and the work involved. Donaldson assesses what’s required and gives you upfront pricing before any work begins, so you know the cost before you decide. See all our plumbing services.
Helpful resources
Everything you need to make confident decisions about your home.
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Call (519) 439-4328 or schedule your service online.
