A device for collecting waste water in a dishwashing machine. The device
includes a pump well and a sump section, with the sump section
communicating with the pump well in the lower regions of the dishwashing
machine through an inflow section. The device also contains a valve
located in or operating with the inflow section that blocks the influx of
waste water from the pump well into the sump section when the valve is
closed. The valve allows the influx of waste water from the pump well
into the sump section when the valve is opened.