A fuel filter comprising a manifold, a connector element, a filter bowl, a filter element, an inlet shutoff valve, an outlet shutoff valve, an inlet port, an inlet conduit, an outlet port, an outlet conduit and a relief valve in which the connector element is fixed to the manifold, and the filter bowl is reversibly fixed to the connector element, the connector element is adapted to engage with the filter element, the filter bowl is adapted to reversibly receive the filter element and is so configured that when the filter element is located within the filter bowl and the filter bowl attached to the connector element the filter element divides the space defined by the connector element and filter bowl into an inlet filter chamber and an outlet filter chamber, the inlet port is incorporated in the manifold, and the inlet port and inlet filter chamber are in fluid communication via the inlet conduit, the outlet port is incorporated in the manifold and the outlet port and outlet filter chamber are in fluid communication via the outlet conduit, characterised in that the inlet shutoff valve is biased by a biasing means into a closed configuration which prevents fuel flowing along the inlet conduit when fuel in the inlet conduit has a fuel pressure below a predetermined value, the outlet shutoff valve is biased by a biasing means into a closed configuration which prevents fuel flowing along the outlet conduit when fuel in the outlet filter chamber has a fuel pressure below a predetermined value, the relief valve is biased by a biasing means into a closed configuration in which fuel flowing between the inlet filter chamber and outlet filter chamber passes through the filter element, and movement of the relief valve into an open configuration allows fuel to flow between the inlet filter chamber and the outlet filter chamber via the relief valve without the fuel passing through the filter element, and the relief valve is caused to move into its open configuration from its closed configuration when the difference between the fuel pressure in the filter inlet chamber and the filter outlet chamber is equal to or greater than a predetermined value. the connector element is fixed to the manifold, and the filter bowl is reversibly fixed to the connector element, the connector element is adapted to engage with the filter element, the filter bowl is adapted to reversibly receive the filter element and is so configured that when the filter element is located within the filter bowl and the filter bowl attached to the connector element the filter element divides the space defined by the connector element and filter bowl into an inlet filter chamber and an outlet filter chamber, the inlet port is incorporated in the manifold, and the inlet port and inlet filter chamber are in fluid communication via the inlet conduit, the outlet port is incorporated in the manifold and the outlet port and outlet filter chamber are in fluid communication via the outlet conduit, characterised in that the inlet shutoff valve is biased by a biasing means into a closed configuration which prevents fuel flowing along the inlet conduit when fuel in the inlet conduit has a fuel pressure below a predetermined value, the outlet shutoff valve is biased by a biasing means into a closed configuration which prevents fuel flowing along the outlet conduit when fuel in the outlet filter chamber has a fuel pressure below a predetermined value, the relief valve is biased by a biasing means into a closed configuration in which fuel flowing between the inlet filter chamber and outlet filter chamber passes through the filter element, and movement of the relief valve into an open configuration allows fuel to flow between the inlet filter chamber and the outlet filter chamber via the relief valve without the fuel passing through the filter element, and the relief valve is caused to move into its open configuration from its closed configuration when the difference between the fuel pressure in the filter inlet chamber and the filter outlet chamber is equal to or greater than a predetermined value.