"Dallas" wrote in message
...
On Wed, 14 Nov 2007 19:46:39 GMT, Viperdoc wrote:

You could get a prescription and then use a medical bottle

I distinctly remember reading that medical O2 was not acceptable (legal?)
for aviation.

Something about the humidity being too high and freezing in the valve.

--

That's always been my take on it to Dallas, per our suppliers. Medical and
industrial are filled from the same source. Aviation is essentially the
same, but has to be dryer to avoid freezing in extremely low temps.

Precautions taken to avoid impurities in the filling process might differ.
But I bet there are some industrial OX users that are pretty picky about
getting clean pure OX as well. Not everyone just uses it simply for welding
and cutting.