What is the maximum height of a siphon?

Question

What is the maximum height of a siphon?

Answer 1

Roughly ten meters. That is also the highest column of water you can lift by suction. The reason is: on one side you have the body of water open to atmospheric pressure and that is on an average 1013.25 hPa or millibars. It is also roughly 1 kg/cm2 or a column of ten meters water, or 760 cm of Mercury or 29.9 inches of Mercury, which is incidentally what American barometers are calibrated to.

So, if you try to lift by suction water over ten meters, it will simply create vacuum. In fact, the column will be less than ten meters because as the inside pressure of the water will drop, before it becomes vacuum, water will already evaporate as steam. Yes, water boils out at any temperature in vacuum.