Culligan RC Change Basic Water Replacement Cartridge, 3,000 Gallons, EZ-1 (Good Filtration), MultiProvide your family with visibly clean, great tasting water for drinking and cooking FEATURES: Reduces particulates class III, chloride and removes bad taste and odor from water; Use under the sink or in the refrigerator for drinking water and the icemaker; 5 year warranty; includes installation hardware and tubing COMPATIBILITY: Works with Culligan US EZ 1, US EZ 3 and US EZ 4 systems FILTER LIFE: Up to 3,000 gallons or 12 months depending on usage