How often does a backflow preventer need to be inspected?

Backflow preventer inspections follow your local water provider or city code schedule. A technician will confirm the required testing interval on site and provide documentation for your utility. Apollo Plumbing offers backflow prevention service, performed by licensed, insured, and bonded Washington State–certified plumbers in Seattle, Everett, and nearby cities.

Quick checks:

• Look for the last test date on the device tag.
• Ask your city or water utility about their testing cycle.
• Schedule a test after device repair or water pressure changes.

Updated: 2025-12-24

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