Double check valve prevent water flowing back towards its source and back contamination.
Double Check Valve 1/2 Inch (WRAS Approved)
Double Check Valve 3/4 Inch (WRAS Approved)
Double Check Valve 1 Inch (WRAS Approved)
Double Check Valve 1 1/2 Inch (WRAS Approved)
Double Check Valve 2 Inch (WRAS Approved)