A diverter valve comprises a valve body defining first (1), second (5) and third (9) inlets and first (3) and second (7) outlets. A passage is provided between the first inlet and the first outlet and first (11) and second (13) interconnected valve members are provided within the valve body, the valve members being jointly movable between first and second positions. In the first position, fluid is able to pass from the first inlet to the second outlet and from the third inlet to the first outlet, the passage between the first inlet and the first outlet being closed. In the second position, fluid is able to pass from the second inlet to the second outlet and along the passage from the first inlet to the first outlet.