View our list of certified backflow assembly testers.

You may have any tester, certified by the State of Washington as a Backflow Assembly Tester, test your assembly. The testers on our list have provided us with copies of their certification credentials and have requested to be listed by Tacoma Water. If you select a tester not on our list please ensure that the tester provides us with copies of their current state certification and test equipment calibration certificates. We will not accept test reports from testers that have not provided us with this information.

Many cities, towns, & municipalities require that backflow assembly testers obtain a business license prior to being allowed to test within thier jurisdiction.  Tacoma Water does not veriify the status of tester business licenses.  We only verify that the testers on our list are certified by the State of Washington and that their test equipment is calibrated.  The customer and/or tester is responsible for ensuring all local licensing requirements have been met.