Backflow Tester Public List

Many companies offer backflow assembly testing services and repair—including plumbing, irrigation, mechanical, fire sprinkler contractors as well as specialty backflow testing companies. NUD does not recommend nor endorse any specific company or tester over another. This randomly-ordered list merely shows companies who have submitted tests and certification information to our office. You may wish to call more than one company to compare services and costs. We recommend getting more than one bid.

Most testers will submit the proper paperwork to NUD on your behalf. But it is a good idea to keep a copy for your records in the event the test report is not submitted properly.

If you have any questions about backflow test requirements, please contact our Water Quality office at (425) 398-4417 or backflow@nud.net.