Quote:
Originally Posted by divechilly
Hi All,
I know you're supposed to have a visual check on tanks each year.
My wife and I bought six new tanks three years ago. All are filled and they haven't been used in three years. Actually, two have never been used.
I'd like to use them now and hate to waste the fills. Does air go bad? Would it be okay to use the air and then get the visual check done on the tanks when I have them filled? Am I being penny wise and pound foolish?
Thanks.
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Does/should the air go bad? Short answer, no.
Longer answer: If any moisture was introduced to your cylinders when they were initially filled, corrosion could begin to deplete the oxygen content of the gas within. Three years is a long time for the corrosion to work on your tanks (rust in steel or aluminum oxide in aluminum). I could go into details of dive accidents involving this senario, but thats not necessary.
Conclusion: Air is cheap. Get them VIP'd and refilled.
Gary