Thanks to the patented flow used in the AquaClean Calc and Water Filter, the water inside the water filter takes a longer path before entering your super-automatic coffee machine. This ensures a deeper purification for clear water and fine tasting coffee. Ridding your brew of any small particles makes a huge difference to your in-cup quality. The micro-porous filter that is used prevents impurities from contaminating the water, so every cup you make will be fresh, clean and delicious.