Backflow Preventer Repair
CSA B64.10-certified testers · Rebuild kits for every major brand · Municipal submission handled.
What is Backflow Preventer Repair?
Backflow preventer repair is the corrective work performed when an assembly fails its annual certified test — leaking relief valves, fouled check discs, failed shutoffs, broken air-gaps. A failed assembly is a non-compliance issue with your local municipal cross-connection by-law and must be repaired or replaced before the device is returned to service.
First National Fire Protection performs backflow preventer repair across Ontario on every assembly class — RP, DCVA, PVB and SVB — and on every major brand. Our CSA B64.10-certified testers carry brand-correct rebuild kits, so most failures can be repaired and re-tested on the same visit.
Where the assembly is end-of-life or damaged beyond rebuild, we replace it, perform the initial certified test and submit the report directly to your municipality — the same one-call process as our backflow installation service.
Every Backflow Preventer Repair Visit Includes
Failure Diagnosis
Test data reviewed and assembly inspected to identify failed component (relief, checks, shutoffs).
Rebuild Kit Installation
Brand-correct rebuild kit installed by certified tester — usually same visit as the failed test.
Component Replacement
Failed checks, relief valves and shutoffs replaced with manufacturer-listed parts.
Full Assembly Replacement
End-of-life assemblies replaced with appropriate class and line-size unit, permitted as required.
Re-Test & Certification
Post-repair certified test performed and report filed with the municipality.
Annual Reminder Service
Repaired assembly entered into your annual reminder system so next test is never missed.
Ontario Fire Code & Insurer Requirements
A failed backflow preventer is a direct violation of CSA B64.10 and your local municipal cross-connection by-law. Most municipalities (Toronto, Mississauga, Brampton, Ottawa) require the repair to be performed and a clean test report submitted within a defined window, or water service can be shut off.
Our backflow preventer repair service closes the loop — fast diagnosis, certified repair, post-repair test and municipal submission — so your property stays in compliance and your water service stays on.
- CSA B64.10 — Selection and Installation of Backflow Preventers
- Ontario Building Code (O. Reg. 332/12)
- Municipal cross-connection by-laws
Why Property Managers Choose First National Fire
- CFAA-certified technicians
Every fire alarm job inspected by a Canadian Fire Alarm Association certified technician.
- ULC-listed
Meets insurer and Ontario AHJ requirements on every life-safety system.
- Same-day digital reports
Detailed deficiency reports delivered the day of service — AHJ and insurer ready.
- Canada-wide coverage
Toronto, GTA, Ottawa, Hamilton, London and across Ontario from one accountable partner.
- 24/7 emergency response
Round-the-clock dispatch for trouble conditions, activations and burst-line emergencies.
- Portfolio pricing
Preferred rates for multi-location property managers and corporate portfolios.
Backflow assembly failed its test? Book a certified backflow preventer repair.
“We had an unexpected city inspection at one of our short-term rental properties and discovered our fire safety systems were not up to code. First National Fire Protection responded immediately and was on-site within days. The service was thorough, informative, and efficient — exactly what we needed under pressure. We'll be using them for all annual inspections, repairs, and maintenance going forward. Highly recommend.”
Related Repair & Maintenance
Everything We Do
One certified team for every fire protection need in your building.
Inspections
CAN/ULC, NFPA & Ontario Fire Code inspections for every life-safety system in your building — fully documented, AHJ-accepted, delivered the same day.
Installation & Retrofit
Design, supply and installation of complete fire-protection systems — from new construction and tenant fit-outs to full system retrofits in occupied buildings.
Repair & Maintenance
24/7 repair, recharge and corrective maintenance for every fire-protection system — fast response across Ontario, certified parts and full deficiency clearance.
Alarm & Monitoring
ULC-listed 24/7 central station monitoring for fire alarm and security systems — compatible with every major panel, no long-term contracts required.