Backflow Preventer Repair
Fix It and Pass the Retest
Did your assembly fail its test, or is it spitting and dumping water? Our plumbers repair backflow preventers with approved parts, then retest them so you’re back in compliance.
Backflow Preventer Repair for Failed Tests, Leaks and Discharge
Most backflow failures come down to a handful of internal parts. Check valve discs and seats wear or harden over time, so they no longer seal tightly. Springs lose tension. Sand, scale and debris from water mains lodge between the disc and seat, holding a check slightly open. Relief valve diaphragms and seals deteriorate. O-rings dry out and leak. Freezing can crack bodies, bonnets and internal parts in exposed assemblies, especially those left unprotected outdoors during cold snaps.
These problems show up as a failed annual test, water discharging from an RP relief valve, leaks from vacuum breaker canopies or bonnets or dripping test cocks and shutoff valves. Our plumbers handle backflow preventer repair by disassembling the assembly, cleaning internal parts, replacing worn components with manufacturer-approved repair kits and reassembling it to specification. A certified tester then retests the assembly to confirm it passes, and the passing report is submitted to your water utility.
Backflow Preventer Repair Services We Handle
We repair reduced pressure assemblies, double check valves and vacuum breakers of most major brands on domestic, irrigation and fire lines, carrying common repair kits so many failed assemblies are fixed and retested during the same visit.
Check Valves
Clean or replace fouled and worn check discs, seats and springs.
Relief Valves
Repair RP relief valves that dump, spit or fail to open properly.
Vacuum Breakers
Repair leaking canopies, air inlet poppets and checks on PVBs.
Shutoff Valves
Replace leaking or seized ball valves and gate valves on assemblies.
Test Cocks
Replace dripping or damaged test cocks so assemblies can be tested.
Freeze Damage
Repair cracked bonnets and damaged internals after freezing weather events.
Why Your Reduced Pressure Assembly Is Dumping Water
Water discharging from the relief valve of a reduced pressure assembly is alarming, but it’s the device doing its job. The relief valve opens when the pressure difference between the zone inside the assembly and the supply drops too low. Constant discharge usually means the first check valve isn’t sealing, often because debris is caught on the disc or the rubber has worn. A damaged relief valve diaphragm or seat can also cause continuous discharge.
Intermittent spitting often relates to pressure fluctuations in the water supply, such as water hammer or sudden demand changes. In those cases, the assembly may be fine, and the fix involves addressing the pressure issue. Never cap or plug a relief valve to stop the discharge, since that defeats the assembly’s protection and violates code. We diagnose the specific cause, repair the assembly or address supply pressure problems and retest to confirm proper operation.
Why Clients Choose Our Backflow Repairs
We combine licensed plumbing repair with certified backflow testing, so one visit can take a failed assembly to a passing report. Our licensed and insured technicians carry rubber kits, springs and common parts for major brands and use only manufacturer-approved components, which keeps the assembly’s approval valid. We clean every internal surface, reassemble to specification and retest carefully. Results go to your utility promptly, and we explain what failed and why.
Fast Service
Quick and Reliable Plumbing Services.
Qualified Team
Skilled and Certified Plumbers at Your Service.
Affordable Price
Competitive Quality Plumbing Solutions.
150+ Project Done
Our Track Record of Excellence.
Benefits of Prompt Backflow Preventer Repair
Prompt repair restores protection for your drinking water and your neighbors’ supply. It keeps you in compliance after a failed test, avoiding repeat notices, fees or interrupted service. Fixing a dumping relief valve stops wasted water and potential water damage. Repairing an assembly with rebuild kits usually costs far less than replacing it entirely. And same-visit repair and retesting saves time, scheduling hassles and extra service calls for busy owners.
Backflow Preventer Repair in CA, TX and FL
We provide backflow preventer repair for homeowners, HOAs, landscapers, restaurants and commercial buildings in communities across California, Texas and Florida, restoring failed and leaking assemblies to passing condition quickly and keeping owners in good standing with their utility.
Rubber Kits, Total Kits and Approved Parts
Backflow assemblies are approved as complete units, so repairs must use parts that keep them within that approval. Here’s how repair kits work.
A rubber kit contains the discs, diaphragms, O-rings and seals that wear most often. It’s the most common repair and resolves a large share of annual test failures. A total kit adds springs, seats and other internal components for assemblies with more extensive wear or damage.
Using generic or improvised parts can void the assembly’s approval and cause it to fail again. We use manufacturer-approved kits matched to the brand, model and size. When parts are no longer available for an older assembly, replacement may be necessary, and we’ll explain the options clearly before proceeding.
How Our Backflow Preventer Repair Works
We review the failed test report or symptoms, identify the assembly brand, model and size and confirm repair parts are available.
On site, we close both shutoff valves and bleed pressure through the test cocks. We disassemble the failed section, inspect and clean internal parts and replace worn discs, seals, springs or diaphragms using approved repair kits. Damaged test cocks or shutoff valves are replaced as needed, and everything is reassembled to specification.
Once flow is reopened gradually and trapped air is purged, a certified tester performs a complete retest, confirming each check and relief function meets requirements. The passing report is submitted to your water utility, and you receive a copy along with an explanation of what failed and what was repaired.
Get Your Assembly Passing Again
Failed backflow test or a relief valve dumping water? Our licensed plumbers deliver backflow preventer repair with approved parts and same-visit retesting.
Backflow Preventer Repair Questions Answered
Why did my backflow assembly fail?
Common causes include debris on check valve seats, worn rubber discs, weak springs and deteriorated relief valve diaphragms or seals.
Can I just cap the relief valve?
No. Capping or plugging a relief valve defeats the assembly’s protection, violates code and can allow contaminated water into the supply.
Is repair cheaper than replacement?
Usually yes. Rebuild kits cost much less than new assemblies, unless the body is damaged or parts are no longer available.
Does a repaired assembly need retesting?
Yes. Every repair must be followed by a retest from a certified tester, and the passing results go to your water utility on file.
How long does a repair take?
Many repairs and retests are completed in about an hour or two, depending on the assembly size, type and parts needed.