EIGHT ZeroWater® Replacement Filters (ZF-201) Enjoy great-tasting water with the latest filter technology. The ZeroWater filtration system combines FIVE sophisticated technologies that work together to remove virtually all dissolved solids from your tap water, delivering you great tasting water. ZeroWater's first layer of filtration, activated carbon and oxidation reduction alloy removes the chlorine taste you are accustom to with tap water. The Ion Exchange stage removes virtually all dissolved solids that may be left over from public water systems or even leached into your water from piping such as Aluminum, Lead, Zinc, Nitrate and more. Three additional stages are included to remove other impurities and to ensure your water receives the appropriate amount of treatment time to deliver a "000" reading on your laboratory-grade Total Dissolved Solids meter included. Stage 1: Activated carbon infused micron cloth. Stage 2: Multi-layer system using activated carbon and oxidation reduction alloy. Stage 3: Distributor that maximizes contact time. Stage 4: Comprehensive ION EXCHANGE array. Stage 5: Non-woven membrane to remove fine particles. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system. Individuals needing water of specific microbiological purity should consult their physician. Unless notified otherwise, municipal water is potable. The contaminants or other substances removed or reduced by this water treatment device are not necessarily in all users? water. *Filtered potable tap water tested by an independent lab (not the FDA) to meet specifically the water quality requirements for using the label ""purified"". Compared to water produced by leading gravity fed filters.