Filter comprising a centring device

A filter cartridge for the use in the interior of a water tank of a domestic appliance having a filter housing of which the wall separates in a watertight manner a housing internal side from a housing external side, wherein a filter inlet opening which in the operating position of the filter cartridge is disposed on the lower end region of the latter and is open in relation to the external environment of the filter housing is provided, wherein provided downstream of the filter inlet opening in terms of the flow direction of water during operation, in the interior of the filter housing, is a device for water conduction which comprises at least one filter chamber having at least one filter medium and terminates in a filter outlet line for suctioning water from the filter cartridge;

• and
• wherein a filter connector having an annular filter sealing face for connecting the filter cartridge in a water tank is provided,
• wherein
• provided within the filter sealing face is a guide structure, disposed separately from this filter sealing face, for receiving a centering element for centering the filter cartridge.