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Nick wrote: > > Which way to turn the valve does not end up being hard to figure out, > > if you left your valves all the way open and a 1/4 turn back. If it only > > turns 1/4, you went the wrong way. > > Please disassemble one of your scuba valves next time you have an empty > tank, and tell me which part of it is going to be damaged by being opened > against the stop and left there. I've disassembled mine, and I can't > tell. I don't think the 1/4 turn back has anything to do with damage. It is historical. Older valves could be very difficult to close after a dive if you left them open all the way. > In any case, I personally think that it is time to adopt a new standard. > Leave valves all the way open or all the way closed. The 'partial valve > open' problems go away, and it is easy to change the state of a valve > that is in an odd position or orientation. This has been proposed here but nothing has changed yet. Alan awright@gs*.bt*.co*.uk*
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