Backflow testing for sprinkler systems in Cary, NC
North Carolina · Last checked November 2026
Cary automatically schedules residential irrigation customers for backflow tests done by town-certified technicians, so owners do not hire their own tester.
Key facts
- Who tests
- Town-certified backflow technicians, scheduled by the town.
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How it works
A lawn sprinkler system connects to drinking water, so it needs a backflow preventer to stop fertilizer and lawn water from being pulled back into the pipes. Most cities require that device to be tested by a certified tester, usually every spring, with the report filed by a set date. Miss it and you can face late fees or a water shutoff notice.
- Find the backflow device near where the sprinkler line leaves the house, often a valve assembly above ground.
- Check your city's deadline. Many fall between May 31 and June 15.
- Hire a tester certified in your state, or wait for the utility if it tests for you.
- Make sure the tester files the report with the city, and keep a copy.
- Not using the sprinklers? Ask about an inactive or deactivation certificate instead of a test.
What it costs
A residential backflow test usually costs about $50 to $150. Some cities add a small filing fee, around $12, and late fees can run $30 to about $80. Repairs to a failed device cost more.
More in North Carolina and nearby
- Apex Test every 2 to 3 years
- Concord Utility runs the test
- Gahanna Test every year
- North Ridgeville Test every year
- Wentzville Test every year
- O'Fallon Test every year
Sources
Last checked November 2026. Programs open, close and change funding every year. Confirm with the city before you hire anyone. Report a change.