The housing (12) has a receiving opening (14) opened on an upper side for receiving a control cartridge (16). The receiving opening is bounded along circumference of a wall (20), and with a discharge opening (40) for discharging water from a discharge orifice. The receiving opening is bounded at lower end of a base (22), and with an inlet opening (26) for supplying water to an inlet orifice (34). An inlet seal groove (57) and a discharge seal groove (60) open on an upper side for receiving an inlet seal element (54`) and a discharge seal element (54``).
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