Abstract: The invention relates to a cleaning container (12) comprising an inlet (120) which is connected to the water container (11), and an outlet for connecting a suction tube (43), the outlet (122) being embodied as a hydrant (124) for a suction handpiece (42) applied to the suction tube (43). The cleaning container (12) can be filled with the water from the water container (11) especially by means of a negative pressure applied to the outlet when the suction tube (43) is connected.

Abstract: A water supply device for dental apparatuses which is provided with an arrangement to prevent backflow of contaminated water from any one of the dental apparatuses into the fresh water supply is characterized by providing a separate container for receiving water from the water system and a pump for pumping water from the container through lines to each of the discharge locations for the dental apparatus. In one embodiment, the pump is driven by an electrical motor and in another embodiment the pump is formed by two air-actuated piston pumps that work asynchronously. The arrangement can include a second container for disinfectant, which is discharged into the first container as fluid is added to the first container.