I've been using a march pump for about a year and a half now and I'm convinced that it's a piece of crap. No matter what I do it will only reliably pump liquid if it's gravity fed to the pump. When pumping "up hill" it might take me 20 minutes of priming to get a good flow. Is this a normal problem for this pump or is it just me? Maybe I don't fully understand the limitations of a pump, but I woud think that the whole purpose of one would be to move liquid from point A to point B dispite the Law of Gravity. I mean' if what I'm trying to move (liquid) could be gravity fed than I wouldn't have bought a $130 pump. Thanks, Mike