No more bad tasting tap water. The Waterstone Multi-Stage Filtration System is compact and has been designed to provide optimum filtration in a single cartridge unit. When used with a Waterstone Filtration Faucet, removes sediment, chlorine, bad taste and odor from municipal drinking water. The integrated multi-stage cartridge contains two sediment pre-filters and a GAC (granulated activated charcoal) primary filter that work together to remove sediment, chlorine taste and odor. Features a single cartridge multi-stage replaceable filter. The first stage is a 20 micron pre-filter, followed by the second stage 5-micron pre-filter, with a final stage GAC (Granular Activated Carbon) filter. Measuring less than 7 inch in width and depth the unit takes up minimal under sink cabinet space and can be wall or floor mounted. The easily removable and replaceable cartridge has a 1000 gallon system life rating. Made to work with WS-300 Safety Valve.