A longer summary: the maximum height of a siphon pumping water, at sea level, predicted by barometric pressure is about 10m.<p>But the tensile strength of water is nonzero (a surprise to me) and that is enough to allow much higher siphons if you first remove dissolved gases from the water.<p>The paper speculates that several hundred metres may be possible, perhaps even more. The paper also describes an actual experiment where they showed that a 15 metre high siphon works in practice.