I have a crappy old death trap UnderPresure Diving booster but surprisingly it been pumping my 3ltr tanks using trimix and pure 02 to 260 bar for a decade without any issues
I also use it to top my 7 ltr and 10 ltr bailouts from 235 bar up to 250bar+ I toped a 10ltr to 280 bar for a 90m dive once or twice
I use a J for drive gas and I fill the J from my compressor
I usede to use a 10PSI electric pump and finish off with a J but after burning out two I stoped bothering
I also use it to top my 7 ltr and 10 ltr bailouts from 235 bar up to 250bar+ I toped a 10ltr to 280 bar for a 90m dive once or twice
I use a J for drive gas and I fill the J from my compressor
I usede to use a 10PSI electric pump and finish off with a J but after burning out two I stoped bothering
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