Backflow testing verifies that a backflow prevention assembly is operating correctly to protect the potable water supply. The test ensures that contaminated water—such as water containing chemicals, pesticides, or sewage—cannot flow backward into the clean water system. It also confirms compliance with local municipal codes and identifies whether the device is leaking, damaged, or allowing reve

To know if your backflow preventer is tested, look for a signed tag or sticker on the device indicating the date of the last inspection by a certified tester, usually required annually. You will also receive a notice from your local water authority, and a certified technician must submit test reports to the city..

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