ESO 7 Espresso Three-Stage Blending Cartridge EV9607-04 Unique three stage blending cartridge provides softened/buffered/filtered water Utilizes ion exchange resin with buffering capabilities and high capacity coconut carbon filtration Small amount of carbon filtered water bypasses softening resin to allow proper initial hardness for the perfect espresso brew Buffering prevents water from becoming too acidic Reduces hardness in water that can cause minerals to build-up in coffee and espresso equipment Reduces minerals such as calcium and magnesium Reduces chlorine, off tastes and odors Sanitary cartridge replacement is simple, quick and clean. Internal filter parts are never exposed to handling or contamination NOTE: No electrical connection required The contaminants or other substances removed or reduced by this drinking water system are not necessarily in your water. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system. Systems certified for cyst reduction may be used with disinfected water that may contain filterable cysts. Features: Buffering Chlorine Reduction Cyst Reduction Ion Exchange Iron Reduction Particulate Reduction Scale Control Taste & Odor TDS Reduction Water Softening/Conditioning