Thank you!!! That helps. 25ft horizontal. Maybe 6ft vertical, that’s just up to top of display (but I guess I can pump new water back into sump, basically removing all vertical height?)?I use a danner 9.5 for the application similar to post #14 above. If yours is the mag drive 12, that pumps 1200 gph, you are good to go. This assumes the 25 ft. of piping is all not straight up. The mag drive 12 will push water up a floor or so, but not 25 ft high. It’s all about the height above the source water. That‘s the head reference earlier.