For use with MultiChoice universal valve body and 1700 series or 1800 series trim Dual-function volume and pressure balance temperature control MultiChoice universal pressure balance cartridge assembly Genuine Delta repair part I'm happy to hear that you were able to resolve the leak! In 2006 we started making a universal MultiChoice valve, which does use this cartridge. If your unit was installed prior to 2006 it would take the RP32104 cartridge. If you need any further help, please feel free to contact us at 1-800-345-3358. delta part rp46463 Delta Model # RP46463 Internet # 100685942 1700 Cartridge Adaptor TempAssure Thermostatic cartridge measures and monitors the temperature of the water and automatically adjusts to maintain a more precise water temperature