Arrived to the home, customer states that there existing Kohler shower valve is constantly dripping water and will not stop. I diagnosed this issue as a failed shower cartridge. I provided options to the client and they would like to go through with replacement of the cartridge. Turned off water to the shower valve using the mana lock system in the basement. Disconnected trim and removed shower cartridge. Cleaned valve body of debris. Supplied and installed new Kohler shower cartridge. Secured cartridge to the shower valve. Set high limit setting and secured my connection. Turned water back on to shower valve and checked for leaks. There are no leaks at this time. Reinstalled shower trim as well.