Its more than this - its that the model of balancing the weight of water with the vacuum pressure being the siphon limit is not correct. This paper shows an al

Its more than this - its that the model of balancing the weight of water with the vacuum pressure being the siphon limit is not correct. This paper shows an alternative model is more likely to be correct. It is that the water boils easily at low pressure, and that is the limit of siphon height. By careful preparation (degassing), boiling is prevented. Which here allows the column to be raised about 10m. A 'law of physics' has been modified. This is pretty cool!