Woodford Add-On Single-Check Vacuum Breaker to Any 3/4-in Hose Connection - Chrome

Add-on to any 3/4 in. hose connection. The Nidel Model 34HD single-check anti-siphon vacuum breaker is designed to protect hose connections from contamination where freezing conditions are expected. Manual draining provides easy sure drainage during cold weather. Uses include outside hose bibbs, wash racks, dairy barns and swimming pools. Woodford, The Choice of Professionals.