How to Replace Stem Valves in Shower Faucets

Getting to the valves stems in your shower may prove to be a more difficult task then replacing them. In some cases, if there is no access panel, one will need to be installed. Usually though, you can tackle this project right from the faucet openings.
The time involved should be about an hour. However if something refuses to come apart or you have a difficult time reaching the valve, it could take longer.

Things You'll Need

• New stem valve assembly the same brand as the old one Flat head and Phillips screwdriver Shower stem socket Flashlight Pliers Adjustable wrench Utility knife

Instructions

1. Turn both hot and cold water off to the entire house. Before you start to disassemble the handles, turn them to the "open" position to let out any water that was in the pipes before you turned the water off.

2. Remove the handles by using a flat head screwdriver and popping off the cap in the front. That will reveal a screw that you will unscrew to pull the handle off. Then remove the trim or escutcheon. It will most likely have a set screw at the bottom that will have to be unscrewed. You may need to cut through any silicone sealant between the trim and the wall to remove it.

3. Place the socket wrench over the valve stem assembly and turn to the left to unscrew it. Take out the stem assembly.

4. Using an adjustable wrench, hold the hex nut in place. Turn the valve/valve seat assembly and remove. Replace the washer that was behind the valve.

5. Place the new valve/valve seat assembly in the pipe and turn it to the right to tighten it. Put the new valve stem assembly in the valve and tighten. Turn the water back on to check for leaks. If there are no leaks, replace the trim and handles.