Originally posted by Alligator:
(additionally - something to think about) larger pipe equals higher cost.
Good point. Another factor is, the bigger the pipe, the harder it is to get perfect joint seals.
If simply used as an overflow, a few pinhole leaks in the joints won't hurt a thing. If used to draw down the pond, pinhole leaks will slow the siphon down, and eventually stop it from flowing. It will drive you bonkers to keep re-starting the siphon.
