It's not just a pipe going around a screw. It's a scooping blade on the bottom, you let us see it in the last minute. If you remove that I doubt the thing works. You are scooping material up and make use of the screw and solid material, with a liquid you need higher velocity and will not be efficient. This is not magic.,(reply>), Also maybe downside is that you need a very long screw and rotating pipe? It's not like the pipe with screw is 2 meters and the height is 10 meters. I think you need a 10 meters pipe. And this is only for vertical use. Horizontal with heights and bends... don't think so.,(reply>), Want to add something, it's a pump basically the bottom is the propeller, don't know how to say correctly in English.