Water-carrying household appliance (11, 111) with: - at least one treatment chamber (14, 114) which can be closed and in which objects can be treated, - at least one water inlet (16, 116) into the treatment chamber (14, 114), - at least one water outlet (17, 117) from the treatment chamber (14, 114), - at least one pump (26, 126), which is connected downstream of the water outlet (17, 117), - water lines, - valve devices and/or water flow adjustment means, - a coarse filter (20, 120) for water with a coarse filter inlet and with a coarse filter outlet for coarsely filtered water, the coarse filter (20, 120) being connected at its coarse filter inlet to the treatment chamber (14, 114) by means of a water line, - a fine filter (30, 130) for water with a fine filter inlet, with a fine filter outlet for finely filtered water and with a fine filtrate outlet for fine filtrate, the fine filter (30, 130) being connected at its fine filter inlet to the coarse filter outlet by means of a water line, - a drain outlet (40, 140) from the appliance (11, 111), - at least one water reservoir (42, 142), which is connected to the pump (26, 126), the drain outlet (40, 140) and the coarse filter (20, 120) and the fine filter (30, 130) by means of water lines, wherein - a water line leads away behind the coarse filter outlet and the fine filter outlet and a valve device and/or a water flow adjustment means are provided therein, - the water reservoir (42, 142) is connected to the coarse filter outlet and to the fine filter outlet and is connected to the fine filter inlet, characterized in that: - the coarse filter (20, 120) has a coarse filtrate outlet for coarse filtrate, - a measuring chamber (36, 136) for examining water and/or filtrate is provided therein, - the measuring chamber (36, 136) has a measuring chamber inlet (37, 37') which is connected to the coarse filtrate outlet or to the fine filtrate outlet by means of water pipes and a valve device or a water flow adjustment means. - at least one treatment chamber (14, 114) which can be closed and in which objects can be treated, - at least one water inlet (16, 116) into the treatment chamber (14, 114), - at least one water outlet (17, 117) from the treatment chamber (14, 114), - at least one pump (26, 126), which is connected downstream of the water outlet (17, 117), - water lines, - valve devices and/or water flow adjustment means, - a coarse filter (20, 120) for water with a coarse filter inlet and with a coarse filter outlet for coarsely filtered water, the coarse filter (20, 120) being connected at its coarse filter inlet to the treatment chamber (14, 114) by means of a water line, - a fine filter (30, 130) for water with a fine filter inlet, with a fine filter outlet for finely filtered water and with a fine filtrate outlet for fine filtrate, the fine filter (30, 130) being connected at its fine filter inlet to the coarse filter outlet by means of a water line, - a drain outlet (40, 140) from the appliance (11, 111), - at least one water reservoir (42, 142), which is connected to the pump (26, 126), the drain outlet (40, 140) and the coarse filter (20, 120) and the fine filter (30, 130) by means of water lines, - a water line leads away behind the coarse filter outlet and the fine filter outlet and a valve device and/or a water flow adjustment means are provided therein, - the water reservoir (42, 142) is connected to the coarse filter outlet and to the fine filter outlet and is connected to the fine filter inlet, - the coarse filter (20, 120) has a coarse filtrate outlet for coarse filtrate, - a measuring chamber (36, 136) for examining water and/or filtrate is provided therein, - the measuring chamber (36, 136) has a measuring chamber inlet (37, 37') which is connected to the coarse filtrate outlet or to the fine filtrate outlet by means of water pipes and a valve device or a water flow adjustment means.