Lowerlobe...read your own post. Specifically
"the air used to fill the bottle was medical air"
and "the air used in medical O2 bottles"
Before you accuse me of being picky, air and oxygen are quite different. Air is a mix of nitrogen (78%), oxygen (21%) and other gases. It is like saying water is Hydrogen gas...
The quote does not make sense, the quoted poster has picked a random number that shows his lack of understanding of simple physics. There is actually no danger of moisture getting in the cylinder while pressure is above 14.7psi (atmospheric pressure at sea level). The 100 psi recommended as minimum is presumably to allow a buffer, and an easy number to remember for crew.
So no, it is NOT what you said.
