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I must assume you mean uniterrupted column of water!

The maximum suction lift of a column of water is the height of a column of water (inside a vertical pipe for instance) that can be supported by atmospheric pressure i.e. approx 14.69psi or 760mm Mercury.

You should be aware that suction does not cause water to lift. Suction produced by various kinds of pump merely removes air from above the column of water and this

allows atmospheric pressure to act upon the base of the water column. The water

column is therefore pushed upwards by atmospheric pressure from below rather than

pulled up by suction from above.

The density, vapour pressure and surface tension of water vary slightly with temperature and atmospheric pressure also varies slightly with weather conditions. Thus the measured height of the water column may vary slightly according to the conditions prevailing when making the measurement.

A good approximation at room temperature is 33 feet or 10 metres.

Dan Hanlon

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13y ago

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