suction jet pumps include a driving line which leads via a jet outlet into a suction chamber , where the suction chamber has a suction opening which interacts with a valve element and through which fluid is sucked into the suction chamber . the valve element together with the suction opening forms a suction valve . the suction jet pump is driven by a driving stream flowing via the driving line . the suction jet pump is arranged in a storage tank and sucks fuel out of a fuel tank into the storage tank . the driving line has a bypass opening which leads into the suction chamber and is arranged in such a manner that the bypass stream thereof acts on the valve element .