Please be advised that online payments and other online services will be unavailable starting on Thursday, August 13, 2026 at 3pm.

During this time, all C2G payment applications and E-Services will be temporarily unavailable while scheduled maintenance is performed.

We anticipate all applications and services will be restored by Monday August 17, 2026.

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Backflow

Home / Residents / Utilities / Backflow

Backflow Prevention

What is a backflow preventer?
A backflow preventer prevents water from flowing back into the City water distribution system due to pressure changes in the customer system or the City system.

Backflow Diagram



Backflow Testing
Annual backflow testing is REQUIRED. Please see this document for additional information.

BSI (800-414-4990) operates our backflow program database. Plumbers can simply visit www.bsionline.com, create a user ID, submit the fees related to your test and enter the test data. Only a certified backflow tester can test or repair backflow preventers.

For BSI online submittal instructions, please see this document.

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