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Posted by Ken Kurtis on February 23, 2007 at 12:30:32:

In Reply to: Air fill in under 30 seconds ? posted by HoloD on February 22, 2007 at 16:36:23:

A fast fill actaully does a disservice to the tank. You can certainly (over time) accelerate metal fatigue. Although this may not really practically affect the tank walls, it certainly could affect the burst disc, which could be come weakened and eventually blow unexpectedly.

If the tank was filled in water, especially cold water, it could have been returned to you "cool". But that doesn't mean the tank didn't warm up, merely that the water absorbed the extra heat from the tank. That, in turn, could theoretcially lead to condensation forming inside the tank, which could lead to rust or oxidation. More reasons why a fast fill is not necessarily a good thing.

Whether the air comes from storage banks or straight out of a compressor is irrelevant. Laws of physics are laws of physics and they don't vary from store to store.

Ken Kurtis
Onwer, Reef Seekers Dive Co.
Beverly Hills, CA

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