Are Re-Tests Required After Repairs? A Clear Answer for Los Angeles Property Owners

In nearly all jurisdictions—including the Los Angeles area—re-tests are required after any repair or replacement on a backflow prevention assembly. Until a certified tester performs and documents a passing re-test, your assembly is considered non-compliant.

That’s why our Backflow Testing Los Angeles experts recommend scheduling the re-test immediately after repairs to protect water quality and avoid violations.Atlas Backflow Services helps property managers, HOAs, hospitals, restaurants, and commercial facilities stay compliant with fast, certified re-tests and on-time reporting to your water purveyor.

Why Re-Testing After Repairs Is Mandatory

When a backflow preventer fails its annual test, it’s typically because one or more internal components (seals, springs, discs, O-rings, diaphragms) are worn, fouled, or damaged. Repairs or rebuilds restore function—but only a passing re-test proves the assembly is working as designed.

Here’s why re-tests are required:

• Public health protection: Backflow devices keep non-potable water from contaminating the public supply. A re-test confirms your repairs truly eliminated the hazard.

• Code compliance: Most Los Angeles water purveyors (e.g., LADWP, Glendale Water & Power, Burbank Water and Power, LA County Waterworks) require a passing test after any repair or replacement before they’ll mark your site as compliant.

• Documentation and liability: A certified test report creates an official record that your assembly meets performance standards post-repair.

• Avoiding fines and shutoffs: Failure to submit a passing re-test within the purveyor’s deadline can trigger notices, penalties, or even service interruption.

This is why our Backflow Testing Los Angeles experts recommend planning the re-test on the same visit as the repair whenever possible.

What Counts as a “Repair” That Triggers a Re-Test?

Any action that affects the internal operation of the assembly generally requires re-testing, including:

• Replacing rubber components (seals, O-rings, diaphragms)

• Installing a rebuild kit (check valve discs, relief valve parts, springs)

• Cleaning or adjusting internal checks or relief valves

• Replacing the entire assembly

• Changing orientation or moving the device location

Even “minor” internal cleanings can alter performance, so our Backflow Testing Los Angeles experts recommend treating any internal work as a repair that must be followed by a certified re-test.

Los Angeles-Specific Expectations You Should Know

While each purveyor sets its own rules, you can expect the following across much of the LA area:

• Re-test required after any repair or replacement. The device is considered non-compliant until a certified re-test passes.

• Certified tester required. Only licensed/certified backflow testers can submit valid results.

• Deadlines apply. Reporting windows vary by purveyor—often the same day or within a few business days after repair.

• Official forms and submissions. Testers typically file directly with the purveyor and provide you a copy for your records.

• Tagging and documentation. The device tag must reflect the latest passing test with the tester’s information and date.

Atlas Backflow Services works with all major Los Angeles purveyors and submits your paperwork correctly and on time to keep you compliant.

The Typical Re-Test Process (Step by Step)

1. Initial test reveals a failure. A certified test identifies the component(s) not meeting criteria.

2. Estimate and authorization. You receive a repair recommendation (for example, a rebuild kit for a Reduced Pressure Principle Assembly).

3. Repair/rebuild performed. Parts are replaced or cleaned to manufacturer specs.

4. Immediate re-test. A certified tester runs the official performance checks.

5. Documentation submitted. Passing results are filed with the purveyor and provided to you.

6. Compliance restored. Your device status is updated, and reminders are set for next year’s test.

To prevent delays, our Backflow Testing Los Angeles experts recommend combining repair and re-test in a single scheduled visit whenever feasible.

How Fast Should the Re-Test Happen?

• Best practice: Same day as the repair.

• Reality: Within the purveyor’s required window (often same day to 5–10 calendar days).

• Risk of waiting: Non-compliance notices, potential fines, or water service action if the deadline passes with no passing result on file.

Atlas Backflow Services prioritizes re-tests immediately after repairs, minimizing downtime and paperwork headaches.

Common Questions About Re-Tests After Repairs

• Do I need a re-test if I only cleaned the checks?

  
  

  Yes. Cleaning changes performance characteristics and requires a certified re-test.

• If I replace the whole assembly, do I still need a test?

  
  

  Yes. New installations require an initial test, and replacements typically require a test plus updated paperwork.

• Will my water be off during the re-test?

  
  

  Usually for a short period. We coordinate to reduce impact on tenants or operations.

• What if the assembly fails again after repairs?

  
  

  Additional repairs may be necessary. We’ll advise on root causes (pressure fluctuations, debris, age) and the most cost-effective long-term fix.

• How much does re-testing cost?

  
  

  Pricing depends on device type, size, location, and access. We provide transparent quotes, and multi-device sites often qualify for bundled rates.

Compliance Tips From LA Pros

• Schedule early. Don’t wait for the due date—repairs and parts lead times can eat into your reporting window.

• Bundle devices. Test all assemblies on site in one visit to reduce costs and admin time.

• Keep records handy. Prior test reports help techs diagnose failures faster.

• Plan for aging assemblies. Devices over 10–15 years may benefit from planned rebuilds or replacements to reduce emergency calls.

• Use certified experts. Accurate testing and timely filing protect you from compliance gaps.

It’s precisely why our Backflow Testing Los Angeles experts recommend proactive testing programs with automated reminders and pre-authorized repair thresholds.

When Are Re-Tests Not Required?

If no internal work was performed and the device passed its annual test, you’re done until the next due date.

Outside of that, nearly any internal adjustment or part replacement means you need a re-test to regain compliance.If you’re unsure whether your maintenance counts as a repair, Atlas Backflow Services can review the scope and advise based on your specific purveyor’s rules.

Why Choose Atlas Backflow Services

• Certified, experienced testers: Skilled with RP, DC, PVB, SVB, and large-diameter assemblies common in commercial and multi-family settings.

• Same-visit repairs and re-tests: We carry common rebuild kits to restore compliance fast.

• On-time reporting: We submit directly to your water purveyor and provide digital copies for your records.

• LA purveyor expertise: Familiar with LADWP, Glendale, Burbank, LA County, and surrounding agencies’ forms and deadlines.

• Proactive compliance: Automated reminders so you never miss a renewal or re-test window.

Our Backflow Testing Los Angeles experts recommend booking re-tests as soon as repairs are approved—often we can complete both in a single appointment.

Key Takeaways:

• Yes, re-tests are required after repairs to backflow prevention assemblies in the Los Angeles area.

• Certified testers must perform and document a passing re-test to restore compliance.

• Deadlines vary by purveyor, but same-day re-testing after repairs is the safest approach.

• Atlas Backflow Services streamlines repairs, re-tests, and reporting so you stay compliant without the hassle.

Need a fast re-test after a repair—or not sure what your purveyor requires? Contact Atlas Backflow Services, and we’ll take it from here.