The invention relates to a steam cooking appliance comprising an evaporator unit using which water can be evaporated and the steam produced in the evaporator unit can be supplied into the cooking chamber of the steam cooking appliance, and a water-supply unit (10) which has a removable water tank (20) comprising a valve unit (50) for coupling to the evaporator unit. According to the invention, the valve unit (50) has two valves (52, 54) formed separately from one another.
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