Patent ID: 8397318

Claim:
A system for flushing a vacuum toilet, comprising: a urinal basin having a drain, which is connected to a drain line, and a bypass line, which is connected via a suction valve to a vacuum system, wherein the drain line discharges into the bypass line upstream of the suction valve, wherein the bypass line is at a first end directly connected to the suction valve and wherein the drain line has a predetermined continuous inclination from the drain to the bypass line in order to transport waste material located therein in the direction of the bypass line to the suction valve because of gravity, wherein the bypass line is configured to provide a main air current therethrough to the vacuum system via the suction valve, wherein the drain line is configured to provide a second air current therethrough to the vacuum system via the suction valve, and wherein the second air current is smaller than the main air current, thereby reducing the noise developed at the drain due to the second airflow caused by the vacuum system.