A filter cartridge for being removably inserted into a filter housing with a housing socket and a housing cover, wherein the filter cartridge comprises at least - a filter element forming a fluid channel with a longitudinal axis, a front end and a rear end; - a connector element being attached to the front end, wherein the connector element has at least: ∘ a forward-facing side facing away from the front end into a forward direction being parallel to the longitudinal axis, and ∘ a peripheral surface with at least one protruding segment, ∘ a first fluid port in the forward-facing side, being in fluid communication with a first fluid opening in a radially outward facing surface of the filter cartridge, ∘ a second fluid port being in fluid communication with the fluid channel; - a gasket being supported on a first and/or second ring surface (61, 62) of the peripheral surface; characterized in, that (i) the gasket is movably supported on the first and/or second ring surface (61, 62); (ii) at least one wedge element with a first wedge surface, and a second wedge surface is movably located on the peripheral surface, wherein the first wedge surface faces towards the protruding segment and the second wedge surface faces away from the peripheral surface; (iii) the wedge element has a back side connecting the first wedge surface and the second wedge surface; (iv) the at least one wedge element is movably supported to be moved in a first direction from a first position into a second position by exerting a force parallel to the longitudinal axis to the back side; and in that a) the at least one wedge element, at least if in its first position, is positioned in between of the gasket and the protruding segment, or b) the protruding segment is in between of the gasket and the wedge element. - a filter element forming a fluid channel with a longitudinal axis, a front end and a rear end; - a connector element being attached to the front end, wherein the connector element has at least: ∘ a forward-facing side facing away from the front end into a forward direction being parallel to the longitudinal axis, and ∘ a peripheral surface with at least one protruding segment, ∘ a first fluid port in the forward-facing side, being in fluid communication with a first fluid opening in a radially outward facing surface of the filter cartridge, ∘ a second fluid port being in fluid communication with the fluid channel; ∘ a forward-facing side facing away from the front end into a forward direction being parallel to the longitudinal axis, and ∘ a peripheral surface with at least one protruding segment, ∘ a first fluid port in the forward-facing side, being in fluid communication with a first fluid opening in a radially outward facing surface of the filter cartridge, ∘ a second fluid port being in fluid communication with the fluid channel; - a gasket being supported on a first and/or second ring surface (61, 62) of the peripheral surface; (i) the gasket is movably supported on the first and/or second ring surface (61, 62); (ii) at least one wedge element with a first wedge surface, and a second wedge surface is movably located on the peripheral surface, wherein the first wedge surface faces towards the protruding segment and the second wedge surface faces away from the peripheral surface; (iii) the wedge element has a back side connecting the first wedge surface and the second wedge surface; (iv) the at least one wedge element is movably supported to be moved in a first direction from a first position into a second position by exerting a force parallel to the longitudinal axis to the back side; a) the at least one wedge element, at least if in its first position, is positioned in between of the gasket and the protruding segment, or b) the protruding segment is in between of the gasket and the wedge element.