A printhead assembly for an inkjet printer, which has a printhead with a plurality of inlets for receiving ink, an extrusion having a plurality of outlets in fluid communication with the plurality of inlets such that the extrusion supplies ink to the printhead, the extrusion having a plurality of ink channels in fluid communication with the plurality of outlets, a plugging device at one end of the extrusion configured to supply ink from the printer to each of the channels respectively, the plugging device having a first plate, a second plate, a series of plugs and a spine, the first and the second plate hingedly connected via the spine such that the series of plugs seal respective open ends of the plurality of channels and the first and second plates overlap and clamp around the exterior surface of the first end of the extrusion. The plugging device also having inlets for receiving ink from the printer, and directing the received ink into respective channels of the extrusion. The first plate has the plurality of inlets, and the extrusion has a plurality of apertures which align with the plurality of inlets.