A method of forming a conduit providing fluid communication between respective reservoirs of an ink tank, the method comprising the steps of: (a) forming a first orifice extending through a first external wall portion of an ink tank defining part of a first ink reservoir of the ink tank; (b) forming a second orifice extending through a second external wall portion of the ink tank defining part of a second ink reservoir of the ink tank; and (c) attaching a substrate over the first and second external wall portions at least about a first continuous seal line surrounding both the first and second orifices to define an external conduit communicatively connecting the first ink reservoir with the second ink reservoir.