Quote:
Originally Posted by m37charlie
Of course I didn't REALLY take him seriously but I thought I'd do a bit of education re 1 bar = 10 m water.
Way to figure out max human suction: take transparent hose, put a bucket (any spec) of water on ground, suck on transparent hose out of 2nd story window, have helper measure max height of water column. I'd guess 6-9 feet.
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To take this even more seriously:
It is not (just) the lack of human suction that makes it impossible to pump (suck) up water more than 10m. It is a theoretical maximum, because the pressure above the water becomes so low that it starts to evaporise/boil (vapour presure) and the water column "breaks". No matter how good your pump you can't get more than 10m.
You would need to lower the pump into the water and make it "push up" the water to get it up from more than 10m.
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