A tool for refilling an implantable pump (100) having at least one reservoir (104). The tool includes a plurality of independent fluid channels (212, 214, 216) a fluid reservoir in fluid communication with a first one of the fluid channels at least one pump fluidly coupled to the fluid channels, the at least one pump and the independent fluid channels differing from each other in number, wherein (i) a pump is configured to apply positive pressure to the first fluid channel so as to drive fluid from the fluid reservoir therethrough, and (ii) a pump is configured to apply negative pressure to the second fluid channel and a connector (210) for removably connecting the fluid channels to the at least one reservoir.
