Drinking 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.

• Cross Connection Control Frequently Asked Questions

Installation Resources

• Irrigation Check List
• Plumbing Permit Application
• Installing a Double Check Valve Assembly (DCVA)
• Installing a Reduced Pressure Backflow Assembly (RPBA)

Testing

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:

http://grcc.greenriver.edu/wacertservices/bat/bat_publiclist.asp

Winterizing

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

  How to Winterize a Backflow Assembly

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