City of Wenatchee buildings are closed to the public at this time. Please read the City Services Update for more information. The City of Wenatchee is working with local partners to provide accurate information about the Coronavirus (COVID-19) to the public. If you have symptoms and reasons to believe your symptoms are connected to COVID-19, please call your healthcare provider. If you have any questions about what is happening in Washington and how the virus is spread, visit the Washington State Department of Health website at:

Cross Connection Control

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Double Check Valve Assembly for landscape sprinkler systemDrinking water is used for a variety of purposes such as watering the lawn, fighting fires, and manufacturing. With all of the uses of drinking water comes the potential for contamination to enter the drinking water system. The goal of the Cross Connection Control Program is to identify potential connections that could contaminate the water and either eliminate the potential connection or protect the water system with a backflow assembly.

Installation Resources


Backflow assemblies must pass a test once upon installation and annually thereafter to make sure it is working. Only a Washington State certified Backflow Assembly Tester can perform the test.

To find a certified tester, Washington Certification Services maintains a list of currently certified testers by county. Please note that the county listing is simply where the tester is based out of and does not limit where they can test.  The list can be found at the following website:

Alternatively, testers can be found by searching "backflow assembly tester near me" on the internet.

Wenatchee Backflow Assembly Tester List


Cold weather can damage backflow assemblies, so take care to winterize if needed.

  How to Winterize a Backflow Assembly


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