I was at my local welding and gas supply the other day and they were asking me how my sub was doing and we got on the conversation about the life support system and how it works. They told me they could not sell me medical grade oxygen with out a prescription from a doctor which I thought was kind of weird. They said I might be able to use oxygen that you use for welding, but it is not as pure. Does anyone on psubs have any ideas on what to do?
Also I had asked a question a while back about the tubing in the K-350. I have decided to go with stainless steal, but was still wondering what wall thickness to go with and how do you connect them (flair fitting, compression fitting, or something else?)
Thanks,
Scott Waters
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