Close water supply valves located on either
side of the thermostatic mixing valve body
(turn clockwise to close).
3.
With a socket wrench of H 13/16" (H 20
mm) and at least 2 3/4" (70 mm) in depth,
remove the on/off valve cartridge from the
body. (rotate out counterclockwise).
Use two wrenches to take apart the
volume control cartridge. With one
adjustable wrench holding the cartridge,
use the other wrench to remove the shank
adapter.
5.
Remove the stem extension from the
volume control cartridge using
screwdriver and replace the cartridge.
6.
Reinstall the replacement cartridge and
trim assembly, reopen water supply valves,
check for leaks.