Backflow Preventer Testing in Toronto (Certified Annual Inspection & Reporting)
Licensed & Insured Drain Repairs
Backflow Valve Inspection and Testing
Residential and Commercial
Obligation free consultation
Adherence to Toronto's Water Supply By-law
Who Needs Annual Backflow Testing in Toronto?
Commercial units (restaurants, salons, offices, retail)
Multi-residential properties
Industrial buildings
Institutional facilities (schools, healthcare, municipal buildings)
Properties with irrigation systems, boilers, fire lines, or chemical feed systems
Any building classified as moderate or severe hazard
Annual backflow preventer testing (RP, DCVA, PVB)
Form B report completion & electronic submission
Backflow device cleaning & rebuild services
Internal component replacement (springs, checks, diaphragms)
Shut-off valve repairs
Test cock replacement
Gauge calibration verification
Emergency “failed test” repairs
Backflow preventer installation & first-year certification
Common Reasons Backflow Devices Fail (and How We Fix Them)
| Symptom | Cause | Solution |
|---|---|---|
| Low differential pressure | worn spring, warped check, debris | rebuild kit, clean seats, retest |
| Relief valve discharging | debris or damaged seal | clean or replace check + diaphragm |
| Leaking shut-off valves | packing worn or stem corrosion | re-pack or replace valves |
| Device vibration | undersized device or missing arrestor | upsize or add arrestor |
| Freeze damage | improper drainage | replace body + add heated box |
Backflow Preventer Installation & First-Year Certification
Site survey and sizing (flow rate, hazard level)
Code-compliant installation above grade with proper spacing
Device startup + first-year Form B certification
Test tag placement + compliance log
Automatic annual reminder 30 days before renewal
Schedule Your Backflow Preventer Inspection Today
Toronto Backflow Testing Requirements (What the City Looks For)
Annual testing by a certified tester
Form B submission for each device
A valid Form C gauge calibration
Approved test equipment
Testing after installation, repair, or relocation
We handle the entire process — testing, repairs (if needed), reports, and communication with Toronto Water.
The City of Toronto has implemented a mandatory requirement, as stated in the Water Supply By-law, for property owners of industrial, commercial, institutional, and certain residential properties to install backflow prevention devices on their water supply lines. This regulation also applies to construction sites. The purpose of this requirement is to safeguard the city’s drinking water by isolating buildings from the municipal water distribution system and preventing the entry of contaminants into the drinking water supply. By installing backflow prevention devices, property owners contribute to maintaining the safety and purity of Toronto’s water resources.
Schedule Your Backflow Preventer Inspection Today
Why Choose Us For Your Backflow Prevention Testing
Certified & Licensed
OWWA- and ASSE-certified testers with decades of commercial and industrial experience.
Fast Form B Submission
We file the report directly with Toronto Water — you get instant confirmation.
Repairs on the Same Visit
We carry OEM rebuild kits to fix failed devices immediately.
Commercial & Industrial Expertise
Restaurants, factories, medical facilities, high-rises — we handle them all.
Gauge-Calibrated Testing
Every test uses a Form C–compliant calibrated gauge.
Competitive Pricing
No surprises, no upselling — just reliable testing.
Benefits of BFP
Installing and maintaining a BFP device is crucial for protecting public health and safety, as well as avoiding fines and legal consequences. Non-compliance with Toronto’s Water Supply By-law can result in significant fines, which may exceed $100,000.
"He Was Very Knowledgeable And Helped Save Me Money"
Our backflow preventor failed, and Eddy from MT Drains & Plumbing Plumbing saved the day! He tested and replaced it swiftly, ensuring we’re safe from costly fines. We’re grateful for his quick and expert service – highly recommend!
Schedule Your Annual Backflow Test
Backflow Preventer FAQ
A backflow preventer is a mechanical valve installed on your water line to stop contaminated or non-potable water from flowing backward into the clean drinking water supply.
It works by monitoring pressure changes inside the line and sealing off the system if back-pressure or back-siphonage occurs. Toronto requires many commercial, industrial, and multi-residential properties to install and annually test these devices to meet the Water Supply By-law.
oronto Water’s Cross Connection Control Program mandates yearly testing to ensure each device is working properly and protecting the city’s drinking water.
Springs, seals, and check valves inside the device wear down over time, and even small failures can allow contaminants to backflow into the municipal system.
Annual certification confirms the device:
maintains proper pressure differential
seals correctly
passes Toronto’s safety standards
is documented on a Form B test report
Without annual testing, a property is considered non-compliant.
If your device fails, it must be repaired or rebuilt before a passing Form B can be submitted.
Common fixes include:
replacing worn springs, checks, or diaphragms
cleaning debris from the seats
repairing leaking shut-off valves
recalibrating pressure components
Our technicians carry rebuild kits for major brands (Watts, Zurn, Febco, Apollo, Wilkins), so most failed devices can be repaired and retested during the same visit.
A standard backflow test usually takes 20–40 minutes depending on the device type (RP, DCVA, PVB), condition, and accessibility.
If repairs are needed, the appointment may extend to 1–2 hours.
After testing, we complete the Form B and submit it directly to Toronto Water so you remain compliant.
A Form B is Toronto Water’s official “Test Report for Backflow Prevention Device.”
We complete and submit it on your behalf and it includes:
device type and serial number
test results (pressure differential readings)
notes on repairs or cleaning
tester certification number
gauge calibration certificate (Form C)
confirmation that the device passes Toronto requirements
You receive a copy for your records.
The required device depends on your building’s hazard classification under the Water Supply By-law:
DCVA (Double Check Valve Assembly): moderate hazards
RP / RPZ (Reduced Pressure Zone): severe hazards
PVB (Pressure Vacuum Breaker): irrigation and specialty applications
We perform a site survey, check your plumbing layout, and confirm the correct device according to Toronto Water’s Cross Connection Control Program.
Yes.
Our certified testers inspect, test, repair, and rebuild all common backflow preventer types, including:
RP / RPZ devices
DCVA assemblies
PVB systems
1″ to 8″ commercial and industrial devices
We also supply the required rebuild kits and provide calibrated gauge testing for accurate certification.
