Wilkins: 3/4" - Hose Connection Vacuum Breaker (Non-Potable Use Only) w/ Manual Drain for Freeze Protection
Application:
Designed for installation on water lines such as service sinks, laundry tubs and hose bibbs to protect against backsiphonage of polluted water into the potable water supply. A break-away set screw is included to prevent unauthorized removal. Assembly shall provide protection where a potential health
hazard does not exist.