Washington State and the Department of Health mandates that all community water systems must initiate and maintain a viable Cross Connection Control Program.  Cross Connection Control is a vital part of ensuring clean and safe water delivery.

What is a “Cross Connection”?

cross connection is any actual or potential connection between a potable water supply and any pipe, vessel, tank, plumbing fixture, equipment, or device through which it is possible for used, polluted, or contaminated water or any other substance to enter into the public water system.

Examples of Cross Connection Include:

  • Irrigation or in-ground sprinkler systems
  • Fire sprinkler systems
  • Swimming pools
  • Chemical dispensers

If you have any of these in your home or business, you need backflow prevention.

backflow is any undesirable reversal of flow from the intended direction as the result of either: backsiphonage (the reversal of flow due to a negative or reduced pressure within the public potable water supply) or backpressure (the reversal of flow caused by pressure which exceeds the operating pressure of the public potable water supply).

Properly installed and maintained backflow prevention assemblies stop contaminated water from reaching your tap or the water system.  Most cross connections will need to have an approved mechanical backflow prevention device or assembly installed.  The type of assembly will depend on the potential hazard present.  They must be tested annually and the City of Fircrest requires a copy of each test report.

Cross-Connection Control and Backflow Prevention | Fair Oaks Ranch, TX - Official Website

For More Information:

Department of Health

Washington Administrative Code – WAC 246 290


Installing a Backflow Device?

You will need a BACKFLOW PERMIT.

Please NOTE:

  1. You will need to purchase your backflow device before applying as you will need the make and serial number of the device to complete the permit application.
  2. Every Backflow Assembly MUST be tested ANNUALLY by a Certified Backflow Assembly Tester with a copy of the annual test to be filed with the City of Fircrest each year.