Abstract: An arrangement for transferring fuel from one or more secondary tanks (12) to a main tank (11), including: a main tank (11), one or more secondary tanks (12), a venturi tube (20) situated close to the main tank (11) and each of the secondary tanks (12). A return line (17) leads surplus fuel back from the fuel-consuming unit (14) to the main tank (11). The return line (17) is divided into as many secondary return lines (18) as the total number of tanks including secondary tanks (12) and the main tank (11). Transfer of fuel from the respective secondary tanks (12) and the main tank (11) to the ancillary space (13) takes place by means of venturi tubes (20) arranged along the secondary lines (18).