Backflow Prevention Services
We provide annual backflow prevention testing, new device installation, repair, and replacement for residential and commercial properties across the Phoenix metro.
Backflow prevention devices protect the municipal water supply from contamination. When water pressure drops suddenly — during a main break, during firefighting, or through a backpressure event — water in your irrigation or industrial system can be drawn back into the city supply. A properly functioning backflow preventer stops this reverse flow.
City of Phoenix, Mesa, Scottsdale, Chandler, Gilbert, and other Valley municipalities require annual testing of backflow preventers on all irrigation systems and commercial connections. The test is performed by a state-certified backflow tester, who submits results to the water utility. Failure to test can result in water service interruption.
Related: Water Filtration Systems
Backflow Prevention Costs in Phoenix
| Service | Low | High |
|---|---|---|
| Annual backflow test (single device) | $75 | $150 |
| Annual test (multiple devices) | $50 | $100/each |
| Backflow device replacement (residential) | $200 | $500 |
| New installation (irrigation) | $250 | $600 |
| Repair (failed test, minor) | $100 | $300 |
Prices are 2026 Phoenix metro averages. Actual cost depends on scope and conditions. Call (602) 894-5291 for a free estimate.
Annual Testing Requirements in Phoenix Metro
Most Phoenix-area water utilities require annual testing of backflow preventers. Deadlines vary by utility (typically January–April). Common utilities in the metro and their requirements:
City of Phoenix Water Services: Annual testing required on all residential irrigation connections with backflow devices and all commercial accounts.
SRP (Salt River Project): Annual test required for irrigation accounts with backflow devices. Results submitted electronically.
EPCOR (serving Maricopa, San Tan Valley, Queen Creek areas): Annual testing required; test reports must be submitted to EPCOR directly.
We submit test reports to your utility on your behalf — you receive a copy and we track your testing schedule to remind you the following year.
Backflow Testing Cost in Phoenix (2026)
| Service | Low | High |
|---|---|---|
| Annual backflow test | $75 | $150 |
| Backflow device replacement | $200 | $500 |
| New installation (irrigation) | $250 | $600 |
Estimates based on 2026 market averages. Actual cost depends on scope, materials, and site conditions. Call for a free, no-obligation quote.