The offered D M Water Cartridge is used to turn the water on and off, and to control the quantity of water flowing through a faucet. Many faucet cartridges are integrated within valves, which provide the structural support from within which the cartridge can perform its water regulation function. The filter cartridge is a cartridge which is inserted into a water filtering system. Its main function is to eliminate pathogens and dangerous substances from water. D M Water Cartridge is very effective.