The invention relates to a vacuum wastewater device, a vacuum wastewater device arrangement as well as a method for removing wastewater from a wastewater reservoir. The vacuum wastewater device comprises a vacuum wastewater device inlet fluidically connectable to a wastewater reservoir, a vacuum wastewater device outlet configured to be supplied with vacuum from a vacuum unit, a valve unit arranged between the vacuum wastewater device inlet and the vacuum wastewater device outlet, an electronic control unit configured to control the valve unit, thereby controlling a fluid flow from the wastewater reservoir through the vacuum wastewater device, and a first sensor arrangement configured to detect a pressure inside the vacuum wastewater device as a first value. In addition, a second sensor arrangement is provided configured to detect a second value related to the vacuum wastewater device.

A rail vehicle for transporting passengers includes at least one wheelchair zone, at least one boarding door, at least one sanitary unit, and at least one galley. The sanitary unit and the galley are disposed between the boarding door and the wheelchair zone. An aisle or path, which is configured to be adequate for wheelchair use, leads from the boarding door to the wheelchair zone.