Kohler has two common valve cartridges (Fig. 1).
- 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 (Fig.2).
NOTE: The most accurate way to identify the valve cartridge is to know the model number of the valve itself.