Watts 3/4" Hose Connection Vacuum Breaker With Freeze Relief

This 3/4 inch hose connection vacuum breaker is designed to prevent the flow of contaminated water back into the potable water supply and is specially made to permit the attachment of portable hoses to hose thread faucets. It provides protection against backsiphonage for health hazard installations requiring non-continuous pressure. This vacuum breaker has a freeze relief feature that protects the valve from freeze damage. It attaches to a sill cock with a 3/4 inch female hose thread by 3/4 inch male hos...