Water filter cartridges icemaker/water dispenser"easy change" No-hassle, no-mess design for cartridge replacement. Simply twists off and on No.IC-1000 icemaker/water dispenser filter with no tools and virtually no spillage of water to reduce lead, Cryptosporidium, Giardia, Lindane, Atrazine, sediment, chlorine and u npleasant tastes and odors. Up to 6-month/500-gallon life depending on usage and water conditions.