Get the Roto-Rooter App

Download
Skip to main content
CareersContact UsResources
Schedule Call 800-768-6911

Commercial Backflow Repair

A backflow system that fails testing, leaks, or shows visible corrosion needs to be repaired to stay code-compliant, and a failed device isn't something to leave for later: Roto-Rooter is available 24/7, 365 days a year, for commercial backflow repair.

Roto-Rooter repairs existing commercial backflow preventers, from a single worn part to a full device rebuild. 

Schedule Online
badge-dollar-solid Save money! Check out available coupons
backflow-hero-repair-v2.webp
Fast, Friendly and Professional Service. Schedule Now!

Signs a Backflow Preventer Needs Repair

  • Failed or borderline results on a recent test
  • Visible corrosion or leaking at the device or its fittings
  • A noticeable pressure drop on the line
  • Freeze damage
  • Unusual noise from the device during operation

How Failures Look Different by Device Type

What a failure looks like changes by device. A reduced pressure zone (RPZ) assembly that's failing commonly discharges water continuously from its relief valve, which is easy to notice because water is visibly draining somewhere it shouldn't. A double check valve (DCV) assembly has no relief valve, so it can fail quietly: the only sign may be a failed test result, since there's nothing to visibly leak or discharge. That's part of why recurring testing matters even when a device looks fine from the outside.

backflow-hero-repair-flexi1-v2.jpg

Emergency vs. Scheduled Repair

A device that's actively discharging, leaking heavily, or has left a required connection (like fire suppression) without protection is an emergency, call right away rather than waiting for a routine appointment. A device that failed a scheduled test but is still holding, with no visible leak, can typically be scheduled as regular service.

If you're not sure which situation you're in, describe what you're seeing when you call and Roto-Rooter can help you prioritize it correctly.

Should I Repair or Replace My Backflow Preventer?

Many failures come down to worn internal parts, like check valve seats or seals, that can be rebuilt in place. A device that fails repeatedly, is significantly corroded, or is well past its expected service life is usually a better candidate for full replacement. A technician can assess the device on-site and recommend the right option.

What Happens After a Repair?

A repaired backflow preventer is retested on-site to confirm it's holding pressure and blocking reverse flow correctly before the technician signs off.

See commercial backflow testing for what that retest involves.

Experiencing a backflow emergency? Request your Emergency Backflow Repair today!

roto-rooter-dayton-backflow-1-landscape-crop.jpg

Backflow Repair - Customer Reviews

01234
We needed our vacuum breaker on our sprinkler system replaced, and Steve (898) went above and beyond for us. He worked in the heat, doing what needed to be done. When the job was complete, he went the extra mile and walked us through where our shutoff valves were, as we just purchased the home two weeks ago. Roto-Rooter came as a personal recommendation to us, and we will be recommending them in the future. Brittany D
01234
My sprinkler system backflow was leaking. I called Roto-Rooter and they came within 35 minutes. They were able to get the parts to replace backflow valve and came back to repair the same day. Very professional work. Also showed me the problem from the old system once removed and explained how to maintain to ensure system works as it should.Excellent work! Randall F
01234
Just had our two hose bibs and our RPZ device for our autofill backup for our pool replaced. Canon Martinka was dispatched to our house within the our and was extremely efficient and had everything done/replaced within a few hours. Colin K

Frequently Asked Questions

Why did my backflow preventer fail its test?

Common causes include worn internal valve parts, debris in the device, corrosion, or freeze damage. A technician can diagnose the specific cause.

Can a backflow preventer be repaired, or does it need to be replaced?

The cause and the device's condition determine the answer. Many issues can be repaired in place; a device that fails repeatedly or is significantly corroded is usually better replaced.

Is a repaired backflow preventer tested again afterward?

Yes. Every repair is followed by an on-site retest to confirm the device is working correctly before it's signed off.

How quickly can a failed backflow preventer be repaired?

Roto-Rooter is available 24/7, 365 days a year, for commercial plumbing issues; a technician can assess timing for your specific situation when you schedule service.

Can a backflow preventer be repaired without shutting off water to the entire building?

In most cases, yes, since the device is usually on a dedicated line rather than the building's whole supply. A technician can confirm the shutoff scope for your specific setup during the assessment.