A fuel filter assembly for preventing backflow of fuel into the fuel line from the fuel tank after the fuel has entered the fuel filter includes a housing having an interior, an inlet port and an outlet port. A filter member and a cage member are positioned in the interior of the housing. The cage member is positioned adjacent to the inlet port of the housing. A stopper member is positioned in the cage member. A biasing member is positioned in the cage member and coupled to the stopper member such that the biasing member urges the stopper member into contact with the housing around the inlet port. Thus, fluid flow through the inlet port is prevented while the stopper member contacts the housing around the inlet port. The biasing member is compacted by fluid flow pressure to permit fluid flow into the housing through the inlet port.