This double-check backflow preventer is designed to protect hose connections from backflow contamination in freezing conditions. Uses include laundry tubs utility sinks boiler room and outside hose bibbs.
Add-on to models 85 95 and Y95. #55180 nozzle required.1-5/32" special threads X 3/4" hose threads. The Woodford Model 34HW Vacuum Breaker is a Single-Check ASSE 1011 Integral Device.