Commercial plumbing
Backflow Device Testing for Commercial Sites
A backflow preventer stops used water from flowing back into the public supply. Commercial properties are commonly required to test these devices on a schedule.
- Clear diagnosis before any cutting or replacing
- Price explained before the work starts
- Tested with water running before we leave
- Booked by phone, no forms
or ring (365) 399-5986Real people answer. Bookings by phone only.
- Licensed & insured (details on request)
- Oakville & Halton
- Phone bookings only

Where you will find these devices
- On the incoming service right after the meter in most commercial buildings.
- On lawn irrigation systems for plazas and condos.
- On fire sprinkler connections.
- On equipment like boilers, dish machines and soda dispensers.
Job sheet: Backflow Device Testing for Commercial Sites
- Where we get in
- Main service past the meter, irrigation boxes and equipment supply lines
- On the van
- Calibrated differential test kit, repair kits for check valves, relief valve parts
- Before we pack up
- Device passes a full differential test after any repair
- How to book
- Phone only: (365) 399-5986
What the annual test includes
- Checking the shut-off valves on either side of the device.
- Measuring pressure differences across each check valve with a test kit.
- Confirming the relief valve opens when it should.
- Recording results on the form your water authority accepts.
Signs you need this now
- A notice that your annual test is due
- Water dripping from the relief port
- New equipment added to the water supply
- A device that has never been tested
- Low pressure after the device was installed
When a test does not pass
- You hear which check or relief part let go, and the likely reason.
- Rubber parts, springs or seats are replaced where the device allows.
- The device is retested after the repair.
- If the device is beyond repair, we quote a replacement.
The visit in five steps
- 1Confirm device type, size and location
- 2Isolate and connect the test kit
- 3Record readings across each check valve
- 4Repair and retest any failed part
- 5Hand over the completed test report
Keep on top of your program
- Note the test due date on every device you own.
- Keep copies of past test reports in one folder.
- Check current Halton Region cross-connection requirements, since programs and forms change over time.
- Tell us about any new equipment tied into the water supply.
Straight answers to common calls
Does a test shut off our water?
Only for a little while. We isolate the device during the test and agree the timing with you first.
Do you submit the report?
We fill in the test results and can help you send them where your water authority asks.
Keep reading
- Commercial Plumbing for Oakville Businesses
A blocked drain in a restaurant or a dead washroom in a plaza costs more than a repair bill.
- Restaurant Kitchens: Grease Interceptors and Lines
Fats, oils and grease are the number one reason commercial kitchen drains fail.
- Plaza Offices, Clinics and Shops
A washroom out of order or a leak dripping on stock needs fast, tidy work.
- Condo Corporations and Rental Buildings
Water in a building moves through shared risers and stacks.
Ready when you are
One call books the visit. Tell us what you are seeing and we will tell you straight what it likely is.