The filter cleans and demineralizes the water, ensuring consistently good water quality and preventing rapid scaling of the device. The high-quality filter material in the cartridge remains active for many weeks. The replacement date can be set on the top of the filter, making it easy to see how long the filter has been in use. To ensure the machine functions properly, regular replacement of the water filter is recommended. For EKS 1500, EKS 2000, EKS 3000.