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Backflow Repairs & Recertification

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Backflow preventer repair in progress showing replacement of check valve disc

Backflow Repair & Recertification — Same-Visit Service Across the I-35 Corridor

When a backflow prevention assembly fails its annual test, you’re on the clock. Your water utility expects a passing test report, and until the assembly is repaired and recertified, your property is out of compliance. Duck Works carries repair kits for all major assembly types — RPZ, DC, PVB, and SVB — so most failures are diagnosed, repaired, and retested on-site during the same visit. No waiting for a second appointment. No coordinating a separate plumber. One team handles the full process from failure to filing — serving Dallas-Fort Worth, Waco, Temple, and Austin.

Schedule a Repair
Call (469) 722-3262

Backflow Repair & Recertification — Same-Visit Service Across the I-35 Corridor

Backflow preventer repair in progress showing replacement of check valve disc

When a backflow prevention assembly fails its annual test, you’re on the clock. Your water utility expects a passing test report, and until the assembly is repaired and recertified, your property is out of compliance. Duck Works carries repair kits for all major assembly types — RPZ, DC, PVB, and SVB — so most failures are diagnosed, repaired, and retested on-site during the same visit. No waiting for a second appointment. No coordinating a separate plumber. One team handles the full process from failure to filing — serving Dallas-Fort Worth, Waco, Temple, and Austin.

Schedule a Repair
Call (469) 722-3262
Backflow preventer repair in progress showing replacement of check valve disc

Why Backflow Assemblies Fail — and What We Fix

Backflow prevention assemblies are mechanical devices under constant water pressure. Over time, internal components wear out, foul with debris, or degrade from water chemistry and mineral deposits. These are the most common failure points we see:

Backflow preventer repair in progress showing replacement of check valve disc
  • Check valve seats and discs Worn or pitted rubber discs that no longer seal properly, allowing water to pass through in the wrong direction. This is the single most common cause of test failures.
  • Relief valve fouling (RPZ assemblies) Debris, sediment, or mineral buildup prevents the relief valve from opening at the correct differential pressure. The RPZ passes water to the drain continuously or fails to dump when it should.
  • Springs losing tension The springs inside check modules and relief valves weaken over time, especially in high-flow or high-pressure installations. Weak springs mean the valve doesn't seat fast enough or firmly enough to prevent backflow.
  • O-rings and seals Rubber O-rings dry out, crack, or swell depending on water chemistry and temperature, causing leaks around the assembly body or test cocks.
  • Debris and sediment Sand, pipe scale, rust particles, or construction debris lodges in the check modules and prevents proper seating. This is especially common in assemblies installed on older water systems or after nearby main work.
  • Freeze damage In exposed installations without proper winterization, ice formation can crack the assembly body, warp internal components, or destroy the relief valve.
Backflow preventer repair in progress showing replacement of check valve disc
Our Process

How We Handle Backflow Repairs

01

Diagnose the Failure

Every repair starts with a proper diagnosis. When an assembly fails a test, the test readings tell us which component failed and why. We don't just replace parts blindly — we identify the root cause so the repair holds.

02

On-Site Repair

We carry manufacturer-specific repair kits for all major backflow assembly brands and types. Most repairs involve replacing check valve modules, relief valve components, springs, O-rings, or seats — work that's done on-site in 30–60 minutes depending on the assembly size and condition.

03

Retest

After the repair, we retest the assembly using the same TCEQ-approved procedures as the original annual test. The assembly must pass all test criteria before we sign off. Results are documented on TCEQ Form 20700.

04

Updated Filing

We file the updated passing test report with your water utility — replacing the failed report with a clean record. Your compliance status is restored.

05

Replacement Recommendation (When Necessary)

If an assembly is too corroded, too old, or too damaged to repair economically, we'll tell you. We provide a written recommendation for replacement with the appropriate assembly type and size, and can coordinate installation with a licensed plumber. We don't push unnecessary replacements, but we won't patch a device that's going to fail again in six months either.

Assembly Types We Repair and Recertify

Assembly Type

Common Repair Issues

Typical Repair Time

RPZ (Reduced Pressure Zone)

Relief valve fouling, check disc wear, spring fatigue, body corrosion

30–60 min

DC / DCVA (Double Check Valve Assembly)

Check seat wear, debris fouling, O-ring failure

20–45 min

PVB (Pressure Vacuum Breaker)

Check valve disc wear, air inlet valve stuck open/closed, spring loss

15–30 min

SVB (Spill-Resistant Vacuum Breaker)

Check disc wear, canopy seal failure, spring fatigue

15–30 min

We stock repair kits for Watts, Wilkins (Zurn), Febco, Apollo, and Ames assemblies. For less common brands, we can typically source parts within 1–2 business days.

Repair vs. Replacement — How We Help You Decide

Not every failed assembly needs to be replaced. Many failures are simple component swaps that restore the device to full function at a fraction of the replacement cost. But sometimes a repair isn’t the right call.

Backflow preventer repair in progress showing replacement of check valve disc

We recommend repair when:

  • The failure is a single component (check disc, spring, relief valve, O-ring)
  • The assembly body is structurally sound with no corrosion or cracks
  • The assembly is less than 15–20 years old and has been maintained
  • Repair cost is significantly less than replacement

We recommend replacement when:

  • The assembly body is corroded, cracked, or structurally compromised
  • Multiple components have failed simultaneously
  • The device has failed repeatedly despite prior repairs
  • The assembly is obsolete with no available parts
  • The hazard classification has changed and the current device no longer meets the required protection level (e.g., a DC where an RPZ is now required)
Backflow preventer repair in progress showing replacement of check valve disc

For each identified cross-connection, we classify the hazard level (high hazard vs. low hazard) and recommend the appropriate type of backflow protection — whether that’s an RPZ, DC, PVB, air gap, or atmospheric vacuum breaker.

Why Facilities Choose Duck Works for Backflow Repairs

Test, Repair, and Recertify in One Visit

Test, Repair, and Recertify — Same Visit

We don’t just test and hand you a fail report. We carry repair kits on every service call so most failures are fixed immediately. One truck, one tech, one visit — your compliance is restored the same day.

TCEQ-Licensed BPAT and CSI Certified

TCEQ-Licensed for Testing and Repair

Our team holds active BPAT licenses, which means we’re authorized to both repair and test backflow assemblies under Texas law. We handle the full process in-house.

Repair Kits for All Major Brands

Repair Kits for All Major Brands

We stock parts for Watts, Wilkins (Zurn), Febco, Apollo, and Ames assemblies. For specialty or less common brands, we source parts quickly and schedule a return trip — usually within 1–2 business days.

20+ Years of Regulatory Experience

Honest Repair-vs-Replace Guidance

We don’t push replacements when a $50 repair kit will restore the assembly to full function. And we won’t patch a device that’s going to fail again next month. You get a straight answer.

Same-Day Reporting and Filing

Same-Day Filing with Your Water Utility

After repair and retest, we file the updated passing report with your utility immediately — so your compliance clock stops.

FAQs

Backflow Repair & Recertification FAQs

  • Can you repair my backflow assembly the same day it fails a test?

    In most cases, yes. We carry repair kits for all common assembly types and brands on every service call. If we test your assembly and it fails, we diagnose the issue, perform the repair, and retest — all in the same visit. The only exception is when the assembly needs a part we don't stock or when the device needs full replacement.

  • How much does a backflow repair cost?

    Repair costs vary based on the assembly type, the failed components, and whether the device needs a component swap or a full rebuild. Most single-component repairs (check disc, spring, O-ring) are significantly less expensive than replacing the entire assembly. We provide the cost before starting any repair work — no surprises.

  • Who is authorized to repair a backflow assembly in Texas?

    Under TCEQ regulations and most local utility cross-connection control programs, repairs to testable backflow prevention assemblies should be performed by or under the supervision of a TCEQ-licensed Backflow Prevention Assembly Tester (BPAT). After any repair, the assembly must be retested by a licensed BPAT and the results filed with the water utility — that part is non-negotiable under Title 30 TAC §290.44(h).

  • What happens if my assembly can't be repaired?

    If the assembly body is cracked, corroded beyond repair, or the required parts are no longer available, we'll recommend replacement. We provide a written recommendation with the appropriate assembly type, size, and installation specifications. We can coordinate installation with a licensed plumber and handle the post-installation testing and filing.

  • How long do I have to fix a failed backflow assembly?

    Timelines vary by water utility, but most give you 30 days from the failed test date to submit a passing retest report. Some utilities are stricter. The safest approach is to schedule your annual test with a company that can repair on the spot — which is exactly what we do.

  • Do you replace entire backflow assemblies?

    We coordinate full assembly replacements when repair isn't feasible. This involves selecting the correct device for your hazard classification, coordinating installation with a licensed plumber, and performing the required initial test and utility filing once the new assembly is in place.

Don't Let a Failed Test Become a Compliance Problem

If your backflow assembly failed — or if you’ve been putting off a repair — call us. We diagnose, fix, and recertify on-site so you’re back in compliance fast.

Schedule a Repair
Call (469) 722-3262

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