Plumber, plumbing, shower repair, tub repair, faucet repair. Tub/shower Valve Cartridge Replacement (oem). Upon arrival the customer stated that their master bathroom garden tub Koehler faucet was leaking on the cold side. Upon inspection I found that the cartridge was leaking through the stem. Went to hardware store and got a cold cartridge . Put cartridge in, turned water back on, checked for leaks and proper operation. OK Tub/shower Valve Cartridge Replacement (oem) Upon arrival the customer stated that their master bathroom garden tub Koehler faucet was leaking on the hot side. Upon inspection I found that the cartridge was leaking through the stem. Went to hardware store and got a hot cartridge . Put cartridge in, turned water back on, checked for leaks and proper operation. OK