Abstract: The disclosure relates to a filter head comprising a housing having one inlet and at least one outlet for being connected to an on-site water pipe. A filter candle having a filter candle inlet and at least one filter candle outlet can be installed in the filter head, and the filter head has means for setting a desired degree of softening by setting a blend ratio. The filter head comprises a flow meter and at least one conductivity measuring device, in particular a conductivity measuring cell, and the filter head has an interface for data transmission to an external unit and an integrated computing unit.

Abstract: A filter candle for treating water is provided, which is adapted to be connected to a filter head. The filter candle comprises a housing which is filled with an ion exchange material for softening the water to be treated. The filter candle has a head with one inlet and at least two outlets, and water that can be introduced into the filter head at a first outlet is more softened than water which can be introduced into the filter head at a second outlet.