Cross-connection control
Backflow preventer testing and repair
A backflow preventer stops dirty water from a boiler, sprinkler or process line flowing back into the city supply. We test the device with a calibrated kit, rebuild failed checks and record the result.
- Gauge-kit readings taken on every test cock
- Failed check valves and relief valves rebuilt
- Devices replaced and installed with proper clearance
- Results recorded for your submission
- 24/7Phone response
- 23Neighbourhoods served
- 42Plumbing services
- 1 callNo forms, no queue
- Licensed & insured plumbers
- Phone answered day and night
- Camera findings shown to you
- North York, Thornhill, Richmond Hill
Where you will find one
- Right after the water meter in a lot of commercial and multi-unit buildings
- On boiler feed lines and closed heating loops
- On fire sprinkler connections
- On irrigation systems, carbonation units and process equipment
How a test works
- Identify the device. Double check valve, reduced pressure zone or pressure vacuum breaker, each with its own test procedure.
- Connect the test kit. Hoses go on the test cocks, and the shut-offs are cycled in order.
- Read each check. The gauge shows if every check keeps the pressure drop the standard calls for, and whether the relief valve opens when it should.
- Record the result. Pass or fail, with readings, so you have what you need for submission.
When a device fails
- Debris on a check seat, often after nearby water main work
- Worn rubber discs and springs on older devices
- A relief valve that dumps water constantly
- Frozen or cracked bodies in unheated rooms
Most failures are fixed with a rebuild kit on site. Older or damaged devices are replaced, and we leave room around the new device so it can be tested easily in future years.
Toronto requirements
The City of Toronto has asked a wide range of properties to fit these devices, have them tested by a qualified tester and send in the reports. Check the current program rules and deadlines for your property type, and keep each year's results.
Clues the device is struggling
- A steady trickle out of the relief opening
- Pressure drops on the floors after the device
- A device that has not been tested in over a year
Questions we get about this
Is the backflow test a yearly job?
Many devices need testing at least once a year. Check the City of Toronto requirements for your property and device type.
Can you repair a failed device the same day?
Often yes, with a rebuild kit on the truck. Large or obsolete devices may need to be ordered.
Does testing interrupt the water supply?
Briefly. The device is shut off for the test, usually for a short window that we schedule with you.