#1 check the box or boxes that describes the use of water at your residence.
Please check the type or types of backflow prevention devices installed on your plumbing system.
Resdential Dual Check (RDC)
Double Check Valve (DC)
Existing device information is needed if checked above.
On order to insure that contamination does not enter the distribution system due to backflow or back siphonage through cross-connections, it may be necessary to install a cross-connection control device.