The TRANSVAC® consists of an inclined tank with a separate inlet and outlet (exit). Both the inlet and outlet have check valves (swing-checks). The inlet check valve allows water and fish to enter the tank, while the exit check valve allows fish and water to flow out of the tank.The tank is supplied alternately with vacuum and pressure. Both vacuum and pressure are developed by a liquid ring pump. Under vacuum, the tank exit seals and fish and water are drawn into the tank through the suction hose which is attached to the inlet. When the tank is full, the vacuum is stopped and pressure is applied to the tank. This pressure causes the exit check valve to open and the mix of fish and water to empty from the tank via a discharge hose attached to the exit connection. When the tank is empty, a vacuum is again applied to the tank and a new transfer cycle begins.