The CRYSTAL QUEST Undersink Replaceable Triple Multi ULTIMATE Water Filter System eliminates the impurities of tap water to offer great taste and pureness. The perfect solution for any household, it is quick and easy to install and use, attractive, convenient, and effectively removes hundreds of contaminants from water. This water filter uses the latest technologies that blend the adsorption capabilities of coconut shell activated carbon with REDOX and more. Water goes through 8 stages of filtration. First, water travels through a sediment filter cartridge that removes sediment, silt, sand dirt, extending the life of water filter. Next, it goes through a 6-stage cartridge, which removes hundreds of contaminants from water. Then, it goes through a solid carbon cartridge for removing volatile organic carbon compounds (VOCs, insecticides, pesticides and industrial solvents). It installs neatly under the sink and comes with an attractive faucet and all the necessary installation hardware. It also conveniently provides 30,000 gallons of water. The six stage filter lasts for up to 3 years, depending on water quality. Sediment and carbon filters should be changed every six months, or when the flow of water will automatically either stop or slow down greatly. CRYSTAL QUEST Undersink Replaceable Double Multi ULTIMATE Water Filter System is great for homes, apartments or office use. It has the option of a Refrigerator/Icemaker hook up.