I built a PVC Quonset pump house about twenty years ago. I used 10 ft. pieces 0f ½” grey electrical conduit mounted on a base made of treated 2x4s, then covered the frame with galvanized corrugated roofing tin. I used plywood for the front and back. The whole thing is held down by a couple of mobile home tie-downs and can be lifted off the pump if need be. It has worked out well, and, thanks to the magic of Kool Seal (or actually of less expensive products similar to Kool Seal), still serves its purpose today. I didn’t get out much back then, and I actually thought a PVC Quonset was an original idea. Since then, of course, I’ve seen many a Quonset made pretty much the same way. It always seemed like PVC pipe and roofing tin would make for a simpler, cheaper, more interesting shed than wood, siding, shingles, and the like. But the problem with making a PVC Quonset bigger than a pump house, at least for me, was the pressure that bigger pipes put on those puny plastic couplings when you...