Keep tap water healthier and tasting better longer with Pitcher Replacement Filters. Longlast replacement filters reduce lead, asbestos, and cadmium impurities that can adversely affect your health over time (substances reduced may not be in all users' water). Change the Longlast filters every 120 gallons, about every 6 months for the average family, for best performance. The pull top cap on these filters makes insertion and removal easy. With activated carbon to reduce chlorine taste and odor, these filters deliver great-tasting water and maintain a healthy level of fluoride, an additive in water (applies to fluoridated municipal tap water). One Filter can replace 900 standard 16.9 ounce water bottles.