Woodford Female Male Brass Backflow Preventer

The Woodford NIDEL® Model 37HD1 hose connection backflow preventer isdesigned 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. Woodford, the Choice of Professionals.