[Compatible]RP19804 cartridge is suitable for 1300/1400 series tub/shower valves (selected monitor valves before 2007, 1300/1400 series single handle tub/shower monitor valves). Make sure of the style of your shower head and choose the correct cartridge. .[Easy to Install]The monitor filter replacement RP19804 is easy to install, no additional tools or modifications are required. You can replace the filter in a short time without replacing the entire fixture. Before installing a cartridge, be sure to clean any contaminants in the old cartridge area. .[Pressure Balanced]This RP19804 shower cartridge uses a pressure-balanced design to maintain water temperature within a range of +/- 3.6°F (+/- 2°C), helping to protect you from sudden changes in hot or cold water pressure. Easily limit the maximum amount of hot water to prevent overheating. .[Spare Part]The shower cartridge is a spare part for the shower faucet in the bathroom. .[Product Material]This cartridge is made of high quality plastic, which is durable, clean and effective. You can use the shower cartridge with confidence, save time, money and water.