The Lifetime Ultra Clean Water Filter is the perfect water filtration system for those who are concerned about the quality of the water consumed by the family. Your Lifetime Ultra Clean reduces bad taste and odor and costs less than bottled water. It effectively reduces lead, cysts including cryptosporidium and giardia lamblia, volatile organic compounds (VOCs), particulates, and chlorine tastes and odors. We recommend changing the cartridge every 6 months or more frequently where the quality of the water requires it. Please contact your distributor for replacement cartridges.