by means of screw threaded engagement it will be appreciated that in other embodiments the central support 3 can be secured in position by an alternative locking means for example the screw thread may be on the internal surface of the central support 3 and the external surface of the locking member 20 with reference to fig2 and 3 the filter body 2 and the central support 3 define an annular volume between them within which a filter cartridge 4 is located and supported at its lower end the filer cartridge 4 carries a series of projections 21 which rest on the shoulder 5 of the filter body 2 to locate the cartridge 4 in position the filter cartridge 4 comprises an upper part 22 and a lower part 23 between which a generally cylindrical hydrophobic filter medium 30 referred to as the filter medium is located an inlet port 24 and an outlet port 25 are provided in the upper part 22 of the filter cartridge 4 the inlet and outlet ports 24 25 are designed for connection to a fuel line or pipe for transferring fuel to or from respectively the filter assembly 1 the inlet port 24 of the filter cartridge 4 is arranged to align with the inlet opening 10 of the filter cover 6 and is connected to an inlet pipe 26 which communicates with for example a low pressure transfer pump not shown the.