A necessary part of any espresso machine is the water filter. The DeLonghi SER 3017 is easy to change. Please remember, your espresso machine to say that you have changed the filter. How to do this in the manual. Otherwise, you will be advised of your on and they refused for security reasons your other services. In the life, health and hygiene interest, the filter should be changed according to specifications of the machine. At Amazon, there are the larger packs of humane prices. 5 Stars!
