WOODFORD, 50HA-BR, DOUBLE CHECK-AUTO DRAINING BRASS VACUUM BREAKER

Double Check-Auto Draining Vaccum Breaker For Models C22 B22 25 27 And 30 With 1 1/8" - 18 Special Threads X 3/4" Hose Threads. The First ASSE 1052 Approved Automatic Draining High-Flow Double-Check Backflow Preventer. When A Hose Is Removed From a Model 50 Equipped Wall Faucet Or Yard Hydrant Two Linked But Independent Check Valves Automatically Move As One To Open A Path Through The Valve Allowing Water To Drain Completely And Prevent Freezing.