BUNN 39000.000099999997 Water Quality Filter System, White Filter cartridges incorporate carbon block media and require no pre- activation Equipment protection from reduced sediment particles that can clog the spray head Consistent brewed coffee and tea from water with reduced sediment and chlorine taste and odor Pre-filter offers exceptional sediment holding capacity and particle reduction to 0.2 microns Sanitary quick connect valve-in-head design simultaneously shuts off and vents water with 1/4 turn, allowing for simple and trouble free cartridge change-outs