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A backflow prevention assembly like the one shown above is what prevents the water in your system from flowing back into the public water supply. The State of Washington Department of Health requires that your backflow assembly be tested annually to insure the safety of our drinking water.
I provide certified backflow testing and repair services for both residential and commercial customers in most areas of King and Snohomish counties. The list of water districts that I am currently affiliated with is on the Services page.
Please call me to schedule a backflow test or if you have any questions about the backflow testing process.
*note - In most cases when an assembly fails a test I will (at no additional charge) take it apart and clean it in an attempt to get the assembly to pass the test. This applies to 3/4" and 1" backflow assemblies with easy access to the check valves.
If you would like to make the annual re-certification of your backflow assembly more of an automatic process, I would be pleased to add you to the Redwood Backflow annual maintenance program.