Irrigation & Backflow
Backflow testing and repair
A backflow preventer keeps irrigation or other non-potable water from flowing back into the drinking water supply. Many water providers require assemblies such as RPZs to be tested each year by a certified tester, who files the results with the provider. Failed assemblies are rebuilt or replaced.
- Same-day service when a plumber is available
- Licensed local plumbers
- Quote before work
Most in-ground irrigation systems have a backflow assembly near the house. Exposed brass assemblies crack when they freeze, so in cold climates they're drained and winterized each fall, and in warm climates they need covers for the occasional hard freeze.
Testing is done with a calibrated test kit, and results go to the city on its required form or portal.
Backflow testing at a glance
- Who tests
- A certified backflow tester
- When
- Often yearly, per your city's notice
- Main risk
- Freezing cracks exposed assemblies
Signs you need backflow testing
- A notice from your city that testing is due
- Water spitting from the relief port
- A cracked body after a freeze
- Irrigation that won't hold pressure
How the plumber handles it
- 1
Test
The certified tester connects a gauge kit and checks each check valve and relief valve.
- 2
Report
Results are filed with the city or water provider.
- 3
Repair if needed
Failed parts are rebuilt, or the assembly is replaced.
What affects the cost
Prices depend on what the plumber finds, so the plumber quotes on site. These are the main factors:
- Assembly type (PVB, RPZ, DCVA)
- Repair kit vs. replacement
- Freeze damage
- Filing requirements
Frequently asked questions
Do I need a yearly backflow test?
Requirements depend on your city and the type of assembly. If your provider sends a notice, the test is required.
How do I protect a backflow preventer from freezing?
Insulated covers help. On forecast hard-freeze nights, some homeowners drain the assembly per the manufacturer's instructions.
Where to get backflow testing
By state: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
Need backflow testing?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.