Ok, I'm trying to use a 40b to make a sump, I want to avoid drilling if possible. I know I can't really mount an external pump above the water level, so I'm wondering if I I mount it below and run pipe up and over the edge, will it work? My thinking is after I prime it and run it once, water will settle and stay in the pump when I turn it off later. Any input it appreciate. I hope I made sense. I will draw a picture and upload later if not