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.
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.