"Jose" wrote in message
...
The FBO didn't completely fill up the tank (1700 psi) before I left

I take it you can tell beforehand from the pressure gauge? Why wouldn't
they fill it completely?

I have frequently run into FBOs that can't supply a full 2000 psi of
pressure. Why this is, I don't know (I mean, I understand the mechanics of
it, but why they maintain their oxygen supply at such a low state, I can't
say). But it's actually unusual for me to get my tank actually filled with
a "fill-up".

By the way, the range of prices I've seen only has a passing relation to the
amount of oxygen I get. Of course, I don't pay full price if I don't get a
full tank, but sometimes I can get a full tank (starting from nearly empty)
for a low price.

Pete