Changing the filter of the PURA / PURA UP is child's play. The integrated LED filter change indicator alerts you when it's time to change your filter. The patented SONVITA filter cartridges can then be replaced in just 30 seconds thanks to the easy EasyClick system. info_icon55bf3a93d4d9b We recommend a 6-month filter change to prevent germs, hygiene and loss of performance. Only with regular filter changes with original Sonvita® filters, we can guarantee a perfect function of the system.