How to Install an Anti-Siphon Protected Wall Faucet

Close the water valve for the existing faucet by turning the handle clockwise until tight. Turn on the existing faucet all the way, draining out any leftover water in the water pipe.

Clamp one pipe wrench to the compression nut that connects the water faucet’s pipe to the water supply line before the water valve. Clamp a second pipe wrench to the water faucet’s pipe, keeping it from turning as you turn the compression nut counterclockwise to loosen the connection.

Back out the screws holding the faucet to the side of the house, and pull on the faucet to remove it from the wall. Loosen the nut on the new faucet’s body, and pull on the water control handle to remove the stem assembly from the faucet’s pipe.

Insert the new faucet’s water pipe into the opening in the wall, stopping when the end of the faucet’s pipe touches the water pipe inside the house. If the faucet does not sit flush with the exterior wall, measure the excess pipe and cut it off with a hacksaw.

Tighten the compression nut to the water pipe using one wrench, while you hold the pipe stationary with the other. Drill new holes, if necessary, where the faucet’s screw holes are located on the outside of the house.

Drive the screws through the holes in the faucet, stopping when they sit flush with the faucet body. Insert the stem assembly back inside the faucet’s water pipe, and tighten the nut onto the faucet’s body with an adjustable wrench. Open the water valve inside the house so you can turn the new faucet on.