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# > 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 recently read (in Undercurrents, I think) that modern valves are designed
to be turned such that the seat is held against the stop, ie. don't need
to back off the 1/4 turn. They mentioned that Sherwood changed their design
many, many years ago. We just never changed our practices. :)

# 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.

I agree. Regardless of the valve or it's manufacture date, either it's
opened or it's closed.

Question for those that back off a 1/4 turn: when you're done diving, do
you close the valve all the way, then open it 1/4 turn, so that it's not
left with constant contact on the seat?  :)


# Nick Simicich - njs%scifi.uucp@uu*.uu*.ne* - njs@bc*.vn*.ib*.co*

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