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On 15 Jan 99 at 20:24, you wrote: > If you are doing required stop dives with a single it would be a > real good idea to bring a pony. Not a little one either. The pony > should be large enough to permit the return trip to the line and any > required deco. If you try to get by with less you are risking your > neck bigtime. I think we've excluded planned deco dives from this discussion. > The other day I filled my HP 100 cu.ft. tank with 3500 psi.. I > put the tank on the boat in the shade. In about half an hour it > started to leak from the tank O-ring (the O-ring between the tank > and the valve). After leaking for about 2 min. half the O-ring blew > out. I have never seen one of these O-rings blow before. It was > visualed and the O-ring was replaced by myself 4 mo. ago. This is interesting, and the first case of anything like this I have heard about (I'm certain there are others, but equally certain its quite rare). How do you figure the O-ring came flying out? There's normally no gap between the valve and cylinder where that could readily happen unless the valve wasn't turned all the way in. Could the O-ring have been defective, damaged or just not installed correctly? How carefully did you inspect the O-ring before installing it? > If this occurred at depth the air would have drained out but quick > and if this was your sole air supply with a Y valve, you better find > a buddy with lots of air to save your butt. Yup, no argument, this is one of those failures that is covered by another team member. How long did it take for the cylinder to drain? While I'm thinking about this ... would the cylinder empty faster at depth than on the boat? If so, why? Art Greenberg artg@ec*.ne* -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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