The EZ-FLO Hose Bibb Anti-Siphon Vacuum Breaker is constructed of a heavy-duty brass body that resists corrosion and provides strength and durability. The vacuum breaker has a maximum pressure of 125 psi and a maximum temperature of 180°F. Features a break-off screw for permanent installation. It is also equipped with a self-draining mechanism that allows water to drain upon shut off. Certified by UPC for product safety.