Clear, clean, great-tasting water for drinking and cooking is easier to achieve than ever before. The Culligan® RC-EZ-1 Level 1 Basic Filtration replacement cartridge reduces bad taste & odor, aesthetic chlorine taste & odor and particulate class III. Installation is easy with twist-on, twist-off design mechanism. This filter can be used in the following Culligan® models; US-EZ-1, US-EZ-3, US-EZ-4, IC-EZ-1, IC-EZ-3, IC-EZ-4, and RV-EZ-3. TV#'s 783504, 787756, 802274 & 802373. The cartridge has a life of up to 12 months or 3,000-gallon capacity.