Backflow Testing Requirements for Peoria Homes

Does a Peoria home need an annual backflow test?

Not as a rule. Peoria says its backflow program applies to and is primarily enforced on commercial businesses. When a backflow device is installed on a residential property, the city recommends an annual test by a certified tester to confirm it works. Circumstances can still require a device on non-commercial property.

That wording comes from the city's own Backflow Prevention page, and it is worth reading closely. "Recommended" is not "required", but the reason behind the recommendation is real. An irrigation system is a cross connection: drinking water pipe on one side, sprinkler heads and emitters sitting in soil, fertilizer and standing water on the other. If pressure in the city main drops suddenly, for example during firefighting or a main break, the city explains that water can be drawn backward from the customer's side into the public system.

The City Code draws the same line between commercial and residential. Section 18-117 requires double check assemblies and reduced pressure assemblies to be tested at installation and at least annually, and names "all commercial pressure vacuum breakers" for annual testing. The pressure vacuum breaker is the device Peoria's FAQ describes as one that can be installed on the water supply line to any landscape irrigation system, which is why it is the one most Peoria homeowners actually have.

Peoria's program at a glance

Sources: City of Peoria, Backflow Prevention and Peoria City Code Sec. 18-117.

Who is allowed to test a backflow preventer in Peoria?

Only a City of Peoria Recognized Tester. The city keeps a recognized-tester list that it regenerates at the start of each month, with the generation date printed in the list's footer. The tester submits the report to the Environmental Division, which is where the 30-day deadline applies.

Recognition is not automatic. To be listed, a tester company must send the city its testers' current certifications, calibration reports for its test equipment, proof of at least $1,000,000 in liability coverage, a current Plumbing, Irrigation, Fire or CR-5 backflow-restricted Arizona Registrar of Contractors licence, and a City of Peoria business licence. Section 18-117 adds that testing follows the University of Southern California Foundation for Cross-Connection Control and Hydraulic Research manual.

For a homeowner, the practical step is simple: before anyone tests, check that the company appears on the current month's list, and ask who will file the report.

What the device itself has to look like

Peoria's City Code also sets physical rules. Under Section 18-116, an approved assembly must be a testable unit fitted with test cocks, at least the diameter of the service line it protects, in an accessible location as close to the service connection as practicable, and each service connection needs its own assembly. The city's FAQ says devices go on the supply line as close as possible to the customer's water meter.

That location matters beyond testing. When a zone valve sticks open, Peoria's conservation page tells residents to turn off the outdoor water at the backflow device, then repair the valve. On many Peoria homes the backflow assembly is the irrigation shutoff, so it should stay reachable, not buried under gravel or hidden behind a shrub. The stuck zone guide covers that emergency.

Is your water even from the City of Peoria?

Check the bill before anything else. The city's backflow program, its notices and its recognized-tester list apply to City of Peoria water customers. Peoria's 2025 water quality report says private companies, Sunrise, Rose Valley and EPCOR, serve certain areas of the city, and those customers should contact their own supplier.

The 2025 water quality report lists contact numbers for each of those companies and for Peoria Water Services. Peoria's City Code defines the city's own water service area as the incorporated parts of Peoria not currently served by a private water company, so a Peoria mailing address alone does not tell you whose rules apply. If a 60-day notice arrives, it will name the program that sent it.

When the device fails or needs replacing

A failed test usually means a check that will not seal, an air inlet or relief valve that misbehaves, or a cracked or worn part. Many assemblies can be rebuilt with a kit for their make and size and retested. Others are replaced. Peoria's FAQ notes that repairs and replacements are charged on top of the test, at the owner's expense.

Replacement brings in Arizona contractor law. ARS 32-1121 exempts small jobs under $1,000 from contractor licensing, but that exemption does not apply where the work requires a local building permit, and the Registrar of Contractors summarizes that a licence is generally required when labor and materials exceed $1,000 or a permit is required. Peoria also requires new installations to be inspected and passed by a recognized tester. Ask who will handle the inspection and file the passing report before work starts.

Breaks around the assembly are a separate repair. If the line between the meter and the device has cracked, the broken sprinkler pipe guide explains how to stop the water and what Peoria's leak lines are for.

Where to go from here

For what changes about this work at a Peoria address, see backflow preventer testing in Peoria. For how testing, rebuilding and replacement work in general, see backflow preventer testing and repair. Peoria's Environmental Division takes backflow correspondence at backflow@peoriaaz.gov or by mail to 19980 N. 111th Ave.