Genuine Woodford 37HD2-BR Backflow Preventer Brass.
The NIDEL Model 37HD1 / 37HD2 hose connection backflow preventers are intended for irrigation purposes and designed to protect hose connections from backflow contamination in freezing and non-freezing conditions.
Manual draining is required and provides easy, sure drainage during freezing weather. Uses include outside hose bibbs, wash racks, dairy barns and swimming pool areas.
