Skip to Content
Valves (Shower & Bath)
Determine 1/2" or 3/4" Valve Cartridge Size
Kohler has two common valve cartridges.
The ½" valve cartridges are part numbers GP77005-RP and GP77006-RP. This cartridge is used in kitchen and bathroom faucets, in showering controls, and in deck-mounted valves.
The ¾" valve cartridges are part numbers 1000188 and 1000187. This cartridge is used in showering controls and in deck-mounted valves.
The key to identifying the difference between the two sizes of valve cartridges is by the shape of the cotter pin.