Jura 72629 Clearyl Smart Water Filter Cartridge (4 Filters) CLEARYL Smart is designed for the Jura Z6 Any machine fitted with the intelligent water system (I.W.S.) recognizes when a filter is inserted The coffee machine will automatically switches to filter mode and starts the rinsing process When the filter capacity is nearly used up the machine prompts the user to change the filter If the filter is not changed, the machine activates descaling mode