SCUBA_Phil
Contributor
I'm another one using welding grade O2 on my RB. Never had a problem. I have oxyhacker's book - very good. And remember, if you ever need to weld, you can do that too!
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If we are talking about diving applications this whole argument is really silly when you consider the purity of the crap we call air.
http://www.airchecklab.com/assets/docs/08AirSpecs.pdf
I'm just curious, what price did you get?
I have never had problems getting my cascade bottles filled but an individual rebreather bottle is almost an impossability. The medical supply places won't fill customer owned tanks even with a perscription. The welding place won't fill anything with a SCUBA valve on it.
What is a good way to get individual bottles filled? I have thought of painting them all green and using CGA540 valves and saying it for welding.
Transfill from a small ("125") welding oxygen bottle. If you're so inclined, there are small oxygen boosters available for around $2K (new) that will allow you to use up most of the source gas.
I have heard much the same except that welding oxygen tanks are not drained before filling.
Call the lab at your gas suppliers bottling plant, and ask them what the difference is between med and welding. Ask them if they vacuum welding bottles.