The Philips AquaClean CA6903 is a water filter designed to improve the performance of your coffee machine and extend its life. Using ion exchange technology, the filter removes calcium from the water, which prevents the formation of limescale in your coffee machine. When the filter is replaced timely at the request of the machine, you can enjoy up to 625 cups of coffee with each filter. AquaClean preserves the coffee's taste for longer and prevents clogging of your machine thanks to innovative features such as ion exchange technology, patented water flow and microporous filter. With this filter, you get optimally purified water that improves the taste of your coffee and extends the life of your coffee machine.