To install an inlet valve in existing construction, start by finding the center of the bottom plate of the wall. Then from the basement use the hole saw to drill a hole up into the wall cavity. (Remember to wear safety goggles throughout the installation process.)

There is a simple way to find the center of a wall. Using a section of wire cut from a coat hanger, drill a pilot hole through the carpet or hard surface floor. Drill as close to the wall as possible — pointing the drill bit at a 45-degree angle.

In the basement, see where the coat hanger has come through. Measure over from the coat hanger to find the center of the bottom of the wall plate. Using the hole saw, drill a hole into the wall cavity.

Using the flashlight, and/or broom handle, check to see that the wall cavity is free from obstructions to the desired height of the inlet valve — before cutting a hole in the wall. Then, on the wall, center a mark above the pilot hole made by the coat hanger. This will be the center of your inlet valve.

Center the wall inlet bracket, trace the outline, then cut a hole in the wall. Attach the wall bracket to an elbow of pipe.

Connect the low voltage wire to the inlet valve stem. Attach a small weight to the opposite end of the wire and feed the wire through the hole to the basement. Insert the inlet valve and bracket into the wall. Mount the inlet valve so the valve folds down to open.

Installing inlet valves in new construction follows the same basic procedures.