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" 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.