Step 3 · Remove Escutcheon and Retaining Clip
With the handle removed, you will see a metal sleeve called a stop tube; pull this straight off. Next, you will see the large decorative plate against the wall, called the escutcheon. It is typically held in place by two long Phillips head screws. Remove both screws and carefully pull the escutcheon plate away from the wall. This will expose the main valve body and the cartridge. You will see a small, U-shaped retaining clip at the top of the valve body. Use needle-nose pliers or a flathead screwdriver to pull this clip straight up and out. Be careful not to lose it.