Patent ID: 8153002

Claim:
Device for treating water comprising: a cartridge, which has a receptacle for receiving treatment agents for water, and a connecting head arranged on the receptacle, which has at least one inlet opening and at least one outlet opening, and with a connecting element, which has a holder for the connecting head with at least one inflow opening and at least one outflow opening, which are connected to the inlet and outlet openings of the connecting head in a sealing manner by means of sealing elements, wherein the connecting head has a cross section that tapers with increasing distance from the receptacle toward a free end, while an outer surface of the connecting head has a first outer surface section which is tilted or curved toward a lengthwise axis of the cartridge and a second outer surface section which is opposite to the first outer surface section to define said cross section, each said at least one inlet opening lying in the first outer surface section or the second outer surface section and each said at least one outlet opening lying in the first outer surface section or the second outer surface section, and the connecting head is inserted in the holder in a direction of the lengthwise axis, while an inside surface of the holder has first and second inside surface sections that complement at least the first and second outside surface section.