A fluid coupling for an extrusion having one or more fluid passageways extending along the extrusion is provided with a recess sized to receive an end of the extrusion. The base of the recess has plugs that plug the open ends of the passageways. The inner surface of the recess is provided with conduits that sealingly engage with apertures in the wall of the extrusion so as to communicate with the passageways in the extrusion. The conduits extend to the outer surface of the coupling to enable connection and fluid communication with a source of fluid for each of the passageways.