Our faucets and their parts are guaranteed for a lifetime, but just in case you would like to make some repairs on your own we have made this cartridge assembly available for you to order. It maintains a balanced pressure of hot and cold water. This cartridge assembly is ideal for DELTA Monitor 1300 and 1400 series bathtubs and showers. Monitor single-function pressure-balance cartridge For Monitor 1300/1400 series bathtubs & showers (before March 2006) Cartridge can be replaced without going into the wall Maintains a balanced pressure of hot and cold water DELTA 1300/1400 Series MultiChoice Universal Cartridge Assembly