A fuel filter comprising a manifold, a connector element, a filter bowl, a filter element, an inlet shutoff valve (38, 36), an outlet shutoff valve (66, 56), an inlet port, an inlet passage, an outlet port, an outlet passage and a relief valve (24, 132) in which the connector element is fixed to the manifold, and the filter bowl is reversibly fixed to the connector element, the connector element and the manifold define a chamber and the chamber is split into a second inlet chamber and a second outlet chamber by the relief valve (24, 132), 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 connection 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 passage and the second inlet chamber, the outlet port is incorporated in the manifold and the outlet port and outlet filter chamber are in fluid communication via the outlet passage and the second outlet chamber, the inlet shutoff valve (38, 36) is biased by a biasing means into a closed configuration which prevents fuel flowing along the inlet passage when the filter bowl is not connected to the connector element, connection of the filter bowl to the connector element causes the inlet shutoff valve (38, 36) to be impelled into an open configuration which allows fuel to flow along the inlet passage, the outlet shutoff valve (66, 56) is biased by a biasing means into a closed configuration which prevents fuel flowing along the outlet passage, the outlet shutoff valve (66, 56) is configured to move into a closed configuration which prevents fuel flowing along the outlet passage when the filter bowl with a filter element within it is not connected to the connector element or there is no filter element within the filter bowl, and connection of the filter bowl with a filter element within it to the connector element causes the outlet shutoff valve (66, 56) to be impelled into an open configuration which allows fuel to flow along the outlet passage, the relief valve (24, 132) is biased by a biasing means into a closed configuration so that fuel flowing between the inlet passage and outlet passage has to pass through the filter element, and movement of the relief valve (24, 132) into an open configuration allows fuel to flow between the inlet passage and the outlet passage via the relief valve (24, 132) without the fuel passing through the filter element. the connector element is fixed to the manifold, and the filter bowl is reversibly fixed to the connector element, the connector element and the manifold define a chamber and the chamber is split into a second inlet chamber and a second outlet chamber by the relief valve (24, 132), 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 connection 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 passage and the second inlet chamber, the outlet port is incorporated in the manifold and the outlet port and outlet filter chamber are in fluid communication via the outlet passage and the second outlet chamber, the inlet shutoff valve (38, 36) is biased by a biasing means into a closed configuration which prevents fuel flowing along the inlet passage when the filter bowl is not connected to the connector element, connection of the filter bowl to the connector element causes the inlet shutoff valve (38, 36) to be impelled into an open configuration which allows fuel to flow along the inlet passage, the outlet shutoff valve (66, 56) is biased by a biasing means into a closed configuration which prevents fuel flowing along the outlet passage, the outlet shutoff valve (66, 56) is configured to move into a closed configuration which prevents fuel flowing along the outlet passage when the filter bowl with a filter element within it is not connected to the connector element or there is no filter element within the filter bowl, and connection of the filter bowl with a filter element within it to the connector element causes the outlet shutoff valve (66, 56) to be impelled into an open configuration which allows fuel to flow along the outlet passage, the relief valve (24, 132) is biased by a biasing means into a closed configuration so that fuel flowing between the inlet passage and outlet passage has to pass through the filter element, and movement of the relief valve (24, 132) into an open configuration allows fuel to flow between the inlet passage and the outlet passage via the relief valve (24, 132) without the fuel passing through the filter element.