Who requires backflow testing?

Most Maricopa County water providers require it every year for irrigation, pools, and commercial connections.

Can you file the paperwork?

Yes, we submit the certification straight to your provider.

Why did I get a notice saying my backflow needs testing?

Most Arizona water providers require an annual certified test on backflow assemblies, usually on irrigation systems and commercial connections, to protect the public water supply. We do the certified test and file the results straight with your water purveyor, so you stay compliant.

What happens if I ignore the backflow test deadline?

Depending on your provider, you can face fines and, in some cases, water service shutoff until the assembly is tested and compliant. The test itself is quick, so it's not worth the risk. We can test and submit the paperwork before the deadline passes.

My backflow device failed the test. Do I have to replace the whole thing?

Not always. Plenty of assemblies are rebuildable. We install the manufacturer's repair kit (new check rubbers, springs, relief parts) and re-test it to pass, and that's a lot cheaper than replacement. We only swap the full assembly when the body is freeze-cracked or too corroded to rebuild.

Why does my backflow keep failing every year?

Hard Valley water scales the internal rubber and seats, so a check that sealed last year stops seating this year. That's the whole reason testing is annual. A device near the end of its service life will fail more often, and at that point replacement is the better value than rebuilding it again and again.

Do I need to protect my backflow in winter?

In the high country, no doubt. Above-ground assemblies in Flagstaff and Prescott freeze and commonly crack the brass body or bonnet over winter, which means a rebuild or replacement come spring. An insulated cover and a proper seasonal shutdown of the irrigation line head off an expensive freeze failure.

Painted illustration of a plumber testing a backflow prevention assembly on a commercial building wall

Plumbing Service

Backflow Prevention & Testing

If you've got an irrigation system, a pool, or a commercial property in Maricopa County, the county wants a certified backflow test once a year. That's what keeps contaminants out of the drinking supply, and it matters. Our certified testers run the test, handle the paperwork, and if the assembly needs a repair or a full replacement, we take care of that too. No runaround.

Book online Or call, 24/7(623) 473-0555

Same-day on most calls. Upfront pricing before any work.

What it costs: Flat-rate per assembly for the annual test, whatever the result. If it fails, we quote the repair or replacement separately once we know which component failed, and we file the paperwork with your water provider either way.

Signs you need backflow prevention & testing

An annual backflow test notice from your water provider
A new irrigation, pool, or fire system needing certification
A failed or leaking backflow assembly

How we handle it

Certified test
We test the assembly and submit the certification to your water provider.
Repair if it fails
Rebuild or replace a failed assembly so you pass and stay compliant.
Annual reminder
We can keep you on a yearly schedule so you never miss the deadline.

What to know about backflow prevention & testing in Arizona

Backflow prevention exists to stop your drinking water from getting contaminated by water flowing the wrong direction, back from an irrigation system, boiler, fire line, or commercial process into the potable supply. It happens when pressure drops, like during a water-main break or a heavy hydrant draw, and that creates back-siphonage that can pull fertilizer, pesticide, or worse into your lines. Arizona takes this seriously. Most valley water providers require an annual certified test on backflow assemblies, and they send notices. Miss it and you can face fines or even a water shutoff until you're compliant.

The testing has to be done by a certified backflow assembly tester. It isn't a look-it-over job. We gauge the assembly's check valves and relief valve against pass/fail criteria with a calibrated test kit, then file the results with your water purveyor. The most common ones we see are the RPZ (reduced pressure zone) for high-hazard applications and the double-check for lower hazard. Irrigation systems and commercial buildings almost always have one, and plenty of homeowners don't even know that brass device by the water meter is a testable assembly with a deadline attached.

Arizona's climate is hard on these devices in two specific ways. First, our hard water scales the internal seats and rubber, so a device that passed last year can fail this year as the checks stop seating. That's exactly why annual testing exists instead of install-and-forget. Second, the assemblies sit above ground and exposed, and in the high country they freeze. A backflow preventer left uninsulated through a Flagstaff or Prescott winter will commonly crack its brass body or split a bonnet, which means a full rebuild or replacement come spring. Insulated covers and a proper winter shutdown head that off.

When a device fails its test, you've got a real repair-versus-replace decision, and we're straight about it. A lot of assemblies are rebuildable. We replace the check rubbers, springs, and relief components with the manufacturer's repair kit (Watts, Febco, and Wilkins all sell them) and re-test to pass, which is far cheaper than swapping the whole assembly. But a freeze-cracked body or a badly corroded older device isn't worth rebuilding, and we'll replace it with an approved assembly and file the new paperwork. Either way you leave compliant, with the test submitted on your behalf.