"The Daring Dufas" wrote
Compressed tanks either need mechanical pumps or, most home medical
suppliers use a cascade system of tanks increasing pressure into the
smaller tanks with each on up the line.

Hummmm, so you say LOX can't be allowed to boil off into O2 gas and
be distributed all over a hospital campus or used to fill portable
O2 tanks?


No, not what I said, It is done often for use, but not for filling tanks.
What I did was is that the oxygen coming off of the LOX is not of sufficient
pressure to fill a compressed tank, you need mechanical pumps to assist.
There are small tanks that can be filled with LOX from big tanks and that is
allowed for local use or portables. You are confusing two different forms
of O2 and the equipment used for them.


UAB hospital has several hospitals next door. The VA, the
county hospital, The Eye Foundation and several clinics are all on
the same street. Many are connected by skywalks so I have to believe
they share resources.

I doubt they have a central tank to go that distance, but I've not seen it.
Post photos or drawings of the layout when you get them.