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Old 09-13-2010, 06:06 PM #1
sau4u
 
 
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Scuba tank cascade system

Hey all, some buddies and I are rigging up a cascade air system. Starting with a number of scuba tanks. My question is as long as the air isnt drained down too much, say down past 1000psi it shouldnt be a problem leaving the tanks on their side when using them, correct. My only worry would be over time a moisture buildup from the scubas being transferred into other pball tanks. Every so often I plan on completely emptying the scubas to drain any moisture that may buildup but what do you think.
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Old 09-13-2010, 07:38 PM #2
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Check with a dive shop about the use of the tanks. From what I recall if you completely drain a scuba tank so it has no pressure in it, you have to rehydro it. So you actually want to leave some pressure in them like 500 psi or maybe a bit more.
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Old 09-13-2010, 07:46 PM #3
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You bet, that is where I figure I would leave 1000 psi in. That way its never empty, protecting the tank and 1000 psi isnt gonna do anything for me anyway.
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Old 09-14-2010, 09:26 AM #4
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When you have the scuba tanks filled, ask the compressor operator what they do to reduce/remove moisture from the fill. From experience, it's usually fairly dry which can give the diver a bit of a dry throat.
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Old 09-15-2010, 03:48 AM #5
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Scuba grade air is just about the best you can get. There is no problem with moisture from a scuba tank as long as you got your tanks filled from a quality fill system.

And as far as how much to leave in them, yes, it is a good idea to leave a little in the tank to prevent moisture from entering. However, if you empty the cylinder completely, you may have to have it internally inspected the next fill (around $5-10).

Laying the tank down is actually pretty smart since they can't fall over accidentally.
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