Watts 994-HMB-GPM 2 1/2"x 3" SS Portable Hydrant Backflow Preventer

Watts 994 2 1/2 inch to 7 NST by 3 inch gallon per meter prevents the reverse backflow through the fire hydrant of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply. The assembly has a stainless steel body, NST fire hose coupling, test cocks, built-in leg, gate valve, stainless steel bottom mounted relief valve, and torsion spring check valves.