Backflow Testing & Prevention in Surprise, AZ
Annual testing, repair, and installation of backflow prevention assemblies for irrigation systems, fire lines, and commercial connections, plus fixes for failed tests.
Backflow prevention protects the public water supply
Backflow is water flowing the wrong way, from a home or business back into the public water supply. A backflow prevention assembly is a valve arrangement that stops that from happening, so irrigation water, chemicals, or other contaminants cannot be pulled into drinking water.
Backflow can happen when pressure drops in the public main, such as during a main break or heavy firefighting use. Without a working device, water sitting in an irrigation line or a commercial system could be siphoned back.
Under the IPC, any connection that could let contaminants into potable water must have backflow protection. Testable assemblies must also be checked on a schedule to make sure they still work.
Common backflow devices
The right device depends on the level of hazard.
| Device | Where it is used | Notes |
|---|---|---|
| Reduced pressure zone (RPZ) | High-hazard commercial connections | The highest level of protection. |
| Double check valve assembly | Fire lines and lower-hazard connections. | Two check valves in series. |
| Pressure vacuum breaker (PVB) | Residential and commercial irrigation | Must sit above the highest sprinkler head. |
| Hose bib vacuum breaker | Outdoor faucets | Simple, non-testable device on the spigot. |
What to do when a backflow test is due
A little prep keeps the test quick.
- Find the device. It is usually near the meter, along the irrigation line, or at the building's service entry.
- Clear access. Trim plants and move items away from the assembly.
- Keep the notice. Your provider's notice lists the device and the deadline.
- Plan a short shutoff. Water to the protected line is off briefly during the test.
- Keep the report. The tester's report is filed with the provider. Keep a copy for your records.
If your device fails the test
A failed test usually means worn rubber parts, debris in a check valve, or a relief valve that will not seal. Most failures are repaired with a rebuild kit, then the device is retested.
Hard water and sediment are common culprits in local devices. When a device keeps failing, replacing it with a new assembly may cost less than repeated rebuilds.
What changes the cost of backflow service
Tests carry a set price, and repairs are quoted after the device is checked.
| Cost factor | How it moves the price |
|---|---|
| Test only or repair | A passing test costs less than a rebuild and retest. |
| Device type | RPZ assemblies have more parts to test and rebuild than a PVB. |
| Size | Larger commercial assemblies cost more to service. |
| Replacement | A new assembly costs more than rebuilding an old one. |
| Access | Buried or enclosed devices take longer to reach. |
Insurance and backflow devices
Insurance does not pay for required backflow testing or device repairs. They are part of owning a property with a protected connection.
Got a test notice? Call (623) 301-9042 and have the device location handy.
Irrigation systems and backflow in Surprise yards
Most Surprise yards are watered by drip or sprinkler systems fed from the house supply. That makes the irrigation connection the most common place a home needs a testable backflow device.
Drip lines sit in soil and mulch, and sprinkler heads sit at ground level where fertilizer and standing water collect. If pressure drops in the street main, that water could be drawn backward without a working device in the line.
Irrigation devices also take a beating from sun and heat. Plastic bonnets crack and rubber seals harden, which is why a device that passed a few years ago can fail today. Replacing a cracked bonnet or a hardened seal is usually a quick fix once it is found.
Backflow test notices come from your water provider, EPCOR or the City of Surprise, not from Maricopa County. Irrigation-heavy neighborhoods such as Sun City Grand and Marley Park have many testable devices on their landscape lines.
Backflow questions in Surprise
Testable assemblies generally need testing at least once a year by a certified tester. Your water provider sends a notice when it is due.
It is usually rebuilt with new internal parts and retested. A device that keeps failing may need replacing.
Homes with irrigation systems usually have one on the irrigation line. Outdoor faucets also need a simple vacuum breaker.
A certified backflow tester. The results are reported to your water provider.
A pressure vacuum breaker only protects properly when it sits higher than the highest sprinkler head it serves.
No. Your provider can require it for any testable device, and a missed test can lead to notices or service issues.
Related services
Businesses usually handle backflow alongside other upkeep through commercial plumbing service. Outdoor faucets need their own protection, covered on our hose bib and outdoor faucet repair page.
Testing is also available to properties in El Mirage with irrigation and commercial devices.