Quote:
33 ft is the maximum from crest of system to drain point for water, or else you will lose the siphon.
If I understand siphons correctly, the 30 to 33 ft limit (literally, one atmosphere of pressure in feet of water) is how high you can lift water on the upward portion of the siphon (entry point to crest). Is there really a maximum limit on how far the water can drop going from the crest down to the exit (minimum limit would be that the drop has to exceed the climb)?

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