This Water Filter fits KitchenAid® Fully Automatic Espresso Machines (models KF6, KF7 and KF8 ; sold separately) and helps reduce the need to descale as often, ensuring your machine is working at its best. In addition, it helps prevent limescale build-up and reduces contaminants including carbon, chlorine, particulates, and lead, which can affect the taste of your beverage - contaminants reduced are not necessarily in all users' water. Replace approximately every 2 months or 50L.