The charcoal filter cartridge removes up to 82% of the chlorine and other impurities found in tap water, significantly improving the taste of the water and coffee. Replace filter every six weeks or after 60 pots of coffee, whichever comes first. For use with Models: Capresso Elegance, CoffeeTEAM models #451, #452, #453, #454, CM200 & CM300, MT500 & MT500 PLUS, MG600 & MG600 PLUS, MT600 & MT600 PLUS, MT900 & MG900.