Annual Testing
Certified DCVA & RP testing with digital reports, tagging, and submission to the City.
Backflow Testing
DCVA & RP Annual Testing — Greater Toronto Area
Annual Backflow Preventer Testing in Toronto
Certified testing, reporting, and full compliance with Toronto’s Backflow Prevention Program — for commercial, industrial, and institutional properties.
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- OWWA-Certified
- CCCS Specialists
- NIST-Calibrated Equipment
BFP Reportsfiled for you
Toronto Backflow Prevention Program
Who is required to have annual backflow testing?
If you own or manage an industrial, commercial, institutional, or Part 3 residential property in Toronto, annual backflow preventer testing is legally required — your devices must be tested every year by a certified tester, with results submitted to Toronto Water.
- Commercial buildings — restaurants, retail, offices, plazas
- Industrial facilities and warehouses
- Institutional buildings — schools, medical, municipal
- Part 3 residential properties (Ontario Building Code)
- Any property with a backflow device under a cross-connection control program
- Properties that received a compliance notice from the City
What We Do
One team for your full backflow compliance
Installation
Compliant RPZ and double check valve installation for new and upgraded systems.
InstallationRepair & Replacement
Fast repair or full replacement of failed devices, with retesting and re-filing.
Repair & ReplacementCross-Connection Surveys
Identify and eliminate contamination risks across your plumbing system.
CCC Surveys
How It Works
Compliance handled end-to-end
1
Assess
We locate and assess every backflow device on your property.
2
Test
Certified testing with NIST-calibrated equipment, on your schedule.
3
Report & Tag
Digital test reports and proper device tagging for your records.
4
Submit
We file results with the City so you stay compliant — no guesswork.
Know Your Device
DCVA vs. RP — which do you need?
The main difference is the level of protection. A Double Check Valve Assembly (DCVA) gives basic protection for low-risk applications; a Reduced Pressure Principle Assembly (RP) adds a relief valve for superior protection in higher-hazard settings.
| Device | Best for | Protection level | Install complexity |
|---|---|---|---|
| Double Check Valve (DCVA) | Low-risk applications | Basic (two check valves) | Simple |
| Reduced Pressure (RP / RPZ) | High-risk / high-hazard | Superior (added relief valve) | Moderate |
Why It Matters
Protecting Toronto’s drinking water
Backflow is the undesired reversal of water flow that can pull contaminated water back into the public drinking water system. It happens in two ways:
Back Pressure
Private-system pressure exceeds the City supply — caused by pumps, elevated tanks, or boiler temperature changes.
Back Siphonage
City supply pressure drops below the private system — caused by water main breaks or nearby firefighting.
Licensed& fully insured
13GTA cities served
100%Compliance-focused
NISTTraceable calibration
What Clients Say
Trusted across the GTA
★★★★★“Highly recommended for their thorough and professional backflow inspection.”
★★★★★“Prompt and efficient testing at our industrial facility. Minimal disruption to operations.”
★★★★★“Quick DCVA replacement, for less than the other guys. Great value.”
Questions, Answered
Backflow testing FAQ
Testing is required once every 12 months. Each device on the property must be tested individually, and any newly installed or replaced device must be tested immediately after installation.
Backflow is the undesirable reversal of water flow that lets contaminated water enter the clean supply. It is caused by changes in water pressure (back pressure or back siphonage) and poses serious health risks.
Yes. Our team consists of OWWA-certified plumbers and Cross Connection Control Specialists (CCCS) experienced in backflow prevention testing, reporting, and tagging.
If a device fails, corrective action is required before compliance is restored. We handle the repair or replacement, retest the device, and submit the documented results to the City.
Absolutely. We encourage property owners to book annual inspections ahead of time so compliance deadlines are never missed. We’ll set a convenient recurring schedule for your property.
A single device is usually tested in under an hour. Properties with several devices take longer, but we schedule the work to minimize disruption to your operations, and water is only shut off briefly at each device.
Yes. We tag each device, prepare the digital test report, and submit the results to the City on your behalf — so you don’t have to chase any paperwork to stay compliant.
We provide certified backflow testing across the Greater Toronto Area — including Toronto, Vaughan, Markham, Richmond Hill, Mississauga, Brampton, Oakville, Pickering, Oshawa, and more. See our service areas.
Stay compliant — book your annual test today
Certified testing, reporting, and submission handled for you across the Greater Toronto Area.