A FILTER ASSEMBLY

A filter assembly (2) is disclosed which comprises a filter element (100) for filtering a fluid, and a mount (14) having at least one port (15), each of the filter element (100) and the mount (14) having interengaging connection formations by which the filter element (100) and the mount (14) can be detachably connected to one another, and the mount (14) defining a flow path for fluid to flow between the port (15) and the filter element (100) when the filter element (100) is connected to the mount (14). The mount (14) includes a valve for controlling flow of fluid along the flow path, the valve including a valve member (214) which can move between an open position in which fluid can flow along the flow path and a closed position in which the valve (214) at least partially prevents flow of fluid along the flow path. One of the filter element (100) and the mount (14) has at least one lug (220) and the other of the filter element (100) and the mount (14) has a ramp surface (130), the lug (220) engaging the ramp surface (130) when the filter element (100) and the mount (14) are brought together along an assembly axis and a cam action between the lug (220) and the ramp surface (130) causing axial movement of the valve member (214) when the filter element (100) is then rotated relative to the mount (14).