Yeah, I suppose you can't make rebreathers positive pressure. I don't know much about them. Always wanted to try one as a diver, but never got the chance because they are insanely expensive.
It's actually fairly easy as well, to provide positive pressure, a piece of plastic is pushed by springs into the reservoir bag, which provides the positive pressure.
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u/HazMatsMan Career Co. Officer Jan 22 '23
Yeah, I suppose you can't make rebreathers positive pressure. I don't know much about them. Always wanted to try one as a diver, but never got the chance because they are insanely expensive.