Department of Clean Supply
Backflow Prevention Testing in Oakville
Water should only ever flow one way: into your building. Backflow devices make sure of it, and they need testing.
- 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

What backflow is
Backflow happens when pressure drops in the supply main, or rises in a building system, and water flows backward from the building into the public supply. If that water touched a lawn irrigation system, a boiler loop or commercial equipment, it can contaminate drinking water. Backflow preventers, such as double look at valve assemblies and reduced pressure zone devices, stop this.
Job sheet: Backflow Prevention Testing in Oakville
- Where we get in
- Testable backflow assembly near the meter or on the irrigation line
- On the van
- Calibrated differential pressure gauge, test hoses, repair kits
- Before we pack up
- Each check valve and relief valve tested to pass
- How to book
- Phone only: (365) 399-5986
Who needs testing
Halton Region has a cross-connection control program that requires many industrial, commercial and institutional properties to have suitable devices and to test them on a schedule. Residential lawn irrigation systems and some homes with special equipment may also need one. Check the current Region by-law and notice letters for exact requirements.
Signs you need this now
- Annual test notice
- New irrigation system
- Commercial unit needing compliance
- Failed previous test
- Leaking relief valve
Typical properties
- Restaurants, clinics and dental offices.
- Multi-unit residential buildings with boilers.
- Homes with in-ground sprinklers.
- Buildings with fire sprinkler systems.
The visit in five steps
- 1Shut off downstream
- 2Connect the test gauge
- 3Test each check and relief
- 4Repair parts if it fails
- 5Record and file results
The test
A certified tester connects gauges to the device's test cocks and checks that each check valve and relief valve holds and opens at the right pressure. Results are recorded and submitted as the Region requires. If a device fails, it is repaired or rebuilt and retested.
Keep your test records. The Region may ask for them, and they show the device's history.
New installations
Where a device is missing, we can install one on the right line with isolation valves for future testing. See also service line replacement and outdoor faucet repair for simple hose vacuum breakers.
Straight answers to common calls
Do houses need backflow testing?
Most standard homes do not, but irrigation and some special systems can. Check with the Region.
Roughly how long is a backflow test?
A single accessible device is usually tested within one short visit.
Keep reading
- Water Service Line Replacement in Oakville
One pipe carries every drop into the house, from the curb stop to the meter.
- Outdoor Faucet Repair in Oakville
The hose bib drips all summer, or worse, it split over winter and nobody knew until the hose went on in May.
- Water Filtration Systems in Oakville
Municipal water in Oakville is treated and tested.
- Call the Desk
There is one way to get to us and it is the fastest one: the telephone.
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.