Originally posted by Joit
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the different density and to a much lesser degree the air is compressible as well, not
that that would play a big part in a small tube of water. Surface tension and
some other factors can play a part. But if used carefully a water level can be
used to build a very respectably level building. I use water levels a lot
because they are unbreakable and quite accurate over a fairly large span.
Good for water works like roofing drains and building sheds too, a laser level is
an overkill for a goat shack or paddock shed.
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Cheers
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