Backflow
Backflow testing
A backflow preventer keeps irrigation water from flowing back into your drinking water supply. Many irrigation companies test and repair them.
What companies offer
- Testing the backflow preventer
- Submitting results where a utility asks for them, at some companies
- Repairing or replacing failed devices
Requirements
Testing requirements vary by water utility and jurisdiction. Check with your water utility or local government; we don't give guidance on requirements.
Methods, parts and prices vary by company. Ask each one what's included and whether parts are extra.
What a backflow test involves
- The tester connects a gauge to test ports on the backflow device.
- They check that the valves hold pressure as designed.
- If it passes, results are recorded; some companies submit them where a utility asks.
- If it fails, the company quotes a repair or replacement.
Where backflow devices usually are
Irrigation backflow devices are often near the house where the irrigation line leaves the water supply, sometimes in a box in the ground or a protective enclosure. Knowing where yours is helps the visit go quickly.
Related guides
Combining tests with other visits
Many homeowners have the backflow device tested at spring start-up, when the system is being turned on anyway. That avoids a separate service call. If your water utility sends a notice with a deadline, mention it so the company schedules in time.
Questions
How do I know if I need a test?
Check with your water utility. Some send notices when a test is due.
Can the test be combined with start-up?
Many companies offer that. Ask in your request.
Who can test a backflow device?
Requirements for testers vary by jurisdiction. Ask the company and check with your water utility.
What if my device fails?
Common fixes include replacing worn parts or the whole device. The company will quote options.
Sprinklers acting up?
Send the details once and hear back from local irrigation companies.