The Culligan D-15 Basic Filtration cartridge reduces bad taste & odor, aesthetic chlorine taste & odor and sediment. The replacement cartridge fits Culligan's RVF-10 and is ideal for well water applications and is designed for point-of-use under-sink or pre-tank RV installations. The filter is not for point-of-entry whole-house applications. The cartridge life is up to 3 months or 250 gallons. This easy-to-install filter provides great-tasting water for cooking and drinking.