1 reference is now made to the embodiment shown in fig3 of the collecting container 4 which is subdivided by an intermediate wall 24 into two chambers wherein a first chamber is in the form of a liquid collecting space 25 and a second chamber is in the form of a gas collecting space 26 or a gas inflow chamber in the embodiment illustrated in fig3 identical components are denoted by the same references the unit consisting of the delivery pump 8 and the drive 9 passes through the intermediate wall 24 of the collecting container 4 with the outer portion 14 being sealed off with respect to the intermediate wall 24 reference 27 denotes a suction intake snorkel which is connected to the inlet opening 20 of the delivery pump 8 and which also passes through the intermediate wall 24 and communicates with the gas collecting space 26 also provided in the intermediate wall 24 is an overflow opening 28 by way of which the gas collecting space 26 and the liquid collecting space 25 communicate with each other as long as the level of the liquid fuel 22 in the liquid collecting space 25 does not exceed a certain height the overflow opening 28 is closable by means of a float valve 29 when a given filling level is exceeded in which case the valve body 30 is lifted by the fuel 22 and closes the overflow opening 28 particularly in a refuelling operation the incoming gas volume flow which is passed by way of the pressure compensating line 5 to the activated carbon filter not shown drives the fan wheel 11 and therewith the pump impeller 10 of the delivery pump 8 the delivery pump 8 draws gas out of the gas collecting space 26 into the.