What is "Hydraulic Design"?

[Poconos]

Siphoning gas is a lot different than the suction line on a pump. You have limited lung volume capacity. If you're thinking of the pump priming sequence, the pump pulls a slight vacuum (self-priming) so the size of the pipe won't matter. It still pulls the same vacuum independant of suction line size.
Al
BTW: Know of no books on the subject other than technical fluid dynamics stuff. Perhaps some of the plumbing books get into this without going into the 'why' but I don't know.