Natural calcium removal thanks to ion exchange technology The ion exchange technology allows calcium to be removed from the water before it flows into the coffee maker, preventing stone deposition. If the filters are replaced on time according to the device's request, then up to 625 cups can be brewed from each of them. Thanks to a filter with microscopic holes, the machine does not clogging AquaClean helps preserve the taste of coffee for longer and prevents stone deposition in the coffee machine with innovative features such as ion exchange technology, patented water flow path and microporous filter. Water optimally purified by patented flow With the AquaClean function, only clean and filtered water flows into a fully automatic coffee maker, minimising the need to degrade. AquaClean allows you to prepare up to 5000 cups of coffee without having to remove the stone at 8 filter replacements. A filter with microscopic holes blocks all impurities Getting rid of all the unwanted particles from your drink greatly improves its taste. A filter with microscopic openings blocks all water contamination, so each prepared cup of drink is fresh, clean and tasty. Activate the filter effortlessly thanks to the Click&Go installation system The installation of the filter is extremely simple. Simply mount the AquaClean filter in the water tank of the fully automatic Saeco coffee maker, activate the function using the user interface, and you can already savor up to 5,000 cups of pure coffee without needing to descal. Activate the AquaClean function to disable the reminder of the need to remove the stone The activation of the AquaClean filter automatically disables the reminder of the need to remove the stone. You can enjoy countless cups of high quality coffee effortlessly — a reminder of the need to remove the stone will be reactivated only after 8 filter exchanges. If the device is equipped with the AquaClean function, there is a special sticker on the water tank. Use Philips accessories only To ensure longer operation of the machine, use only Philips accessories. Philips accessories are the only recommended products for Philips and Saeco express machines.