I want to put a low rpm motor on a pump to aid a thermosiphon device. It's for an outside shower, and I think the thermosiphon would just move too slowly. I found a pump, but it needs a drive. Would I be better off to just buy a low RPM motor, even a 12v. DC and run it off a transformer, or would an AC motor work with a dimmer without damage? The resistance on shaft drag would be minimal, so a small 12v. DC should handle it.
Hint: I got a couple of 1.3 and 1/4 hp motors laying around.
Steve