nothing in the valve, gauge fittings, barrel, etc.
There must have been something in the end of the airtube that attracted moisture. The fill adapter is stainlesss steel and it self wasn't rusted... just some rust fuzz growing on it as seen in the picture.
I guess my theory is "most" folks eventually get a scuba/scba tank if they shoot alot.
Mike T.
TKO Airguns