DIY Frequently Asked Questions / Sill Cock')">
Is a faucet located on the outside wall of the house that easily hooks to garden hoses.
The best type is a frost-proof sill cock, made of heavy red brass, that looks and works like any ordinary faucet. However, water flow valves are located inside the building where it is warm.
The anti-siphon frost-proof sill cock employs integral back-siphon and back-flow devices. These serve to prevent potential back-siphonage, which, if unchecked, could compromise the safe potable water supply to the home. Hose-attached garden sprays and other pressurized canisters can potentially link a cross-connection if a pressure charge occurs when the frostproof is in the open position.
The anti-siphon frostproof sillcock allows for outside spigot usage in freezing climates. The closing member (seat washer) is located inside the heated building.