I’ve been searching for a site with instructions for building an airlift pump for pumping well water. I found the site last year when I was looking at windmills running compressors. In today’s search I ran across a cute little Instructable on airlift pumping for a hydroponic system. I have to do some testing but I think this might be a good way to supply water to a plant wall. As spring gets closer I’ll have to test this technique to see how much water it will pump and how high.