No, the bigger the drop from pond water level to outlet, the stronger the siphon. The crest height does not matter as long as it is no more than 33' above the water level.

I would guess that at some point with a very long drop pipe , the resistance of the pipe itself would come into play. But I can't see this situation in a pond siphon system. Just like I can't envision a dam that is more than 33' above the pond.

Does anyone have any pictures of their siphon during construction?

Hey Moe, I'm trying to think but nuthin's happening!