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Glendale IrrigationROC# #356613, Arizona Registrar of Contractors, Arizona
Brass backflow preventer assembly on riser pipes beside a stucco wall, with its test cocks visible and water droplets beneath them

Backflow Preventer Testing and Repair

Have the assembly at the irrigation tap tested, rebuilt or replaced under the water provider's rules.

Request an estimate(623) 323-5266

What the backflow assembly protects

A backflow assembly sits where the irrigation system leaves the drinking water line, often a brass device on pipes near the front of the house. It stops water that has sat in buried pipes, touched fertilizer or soaked in the soil from flowing back into the public supply when pressure drops. Because it protects everyone on the system, the water provider sets the rules for it, not the homeowner.

In Glendale, City Code Chapter 33 requires an approved backflow device at every service connection, and the city's Cross Connection Control program manages testing. Test reports are filed by testers on the city's list of recognized testers, who recertify every three years. Most properties learn a test is due from a notice sent by the city.

Brass backflow preventer assembly on riser pipes at the front edge of a gravel yard, between the supply side and the yard side, with desert planting and a stucco home behind

Repair, replace and get the report filed

A test can pass, or it can show a check valve or relief valve that needs parts. A worn assembly may be rebuilt or replaced. Glendale's backflow tester policy requires a permit for every installation, retrofit and replacement, followed by an inspection; the irrigation line has its own inspection code. The city will not accept a test report on a new or replaced assembly that skipped the permit and inspection.

Because a permit is involved, Arizona's small-job licence exemption does not apply. Ask any tester or contractor for their Registrar of Contractors licence and check it yourself. Keep a copy of every test report. The backflow rules guide explains the Glendale process in plain steps, and the Glendale backflow page covers the local details.

Brass backflow assembly with its bonnet removed and set on the gravel, beside a cloth holding a new check disc, spring and seal and a plain closed folder

Source: City of Glendale Cross Connection Control, Backflow Tester Policy, Checked Oct 1, 2026

Backflow Preventer Testing and Repair in these areas

This service is offered for homes inside Glendale, Arizona. Open the Glendale page for pressure, backflow, rebate and flood irrigation notes.

11areas covered

Questions about Backflow Preventer Testing and Repair

The test reads whether each check valve inside the assembly holds against reverse flow and whether the relief valve or air inlet opens at the right point, using a calibrated gauge on the test cocks. A tester the water provider recognizes performs it and files the result with the provider, not only with the homeowner.

More about backflow preventer testing and repair

Brass backflow preventer assembly on riser pipes beside a stucco wall, with its test cocks visible and water droplets beneath them

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Request an estimate(623) 323-5266