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I spent some time looking in the archives to look for talks about overfilling the tanks but found nothing. It is true that when we discussed controversial subjects during my full cave diving course, overfilling was not there (we talked about solo diving, deep diving, blind traverses and circuits, visual gaps, diver propulsion vehicle, but not tank overfilling). I felt strange when I was first asked how much air did I want in my tanks. After all, the maximum service pressure is stamped on each cylinder. I heard that steel tanks (Faber) are approved to be filled at 232 bars (approx. 3300 psi) in Europe. People are telling me that these are the same tanks that are rated to 2400 (2640 with + sign) psi by the US Department Of Transport (Approx. 179 bars). Is that really the case??? An older version of the NSS Student Cave Diver Workbook included some articles that talked about overfilling steel 104's (PST tanks). Did anyone made serious research on this? To which extent is it safe or unsafe to overfill steel, low pressure, scuba tanks? Thank you in advance. Michel Therrien m.therrien@ne*.qc*.ca* PS: I have to confess myself that by the end of the week, I appreciated having 370 cubic feet of gas with me (excluding deco gas) on my single staged dives.
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