If I knew that water was possibly getting in my tanks, I'd have them VIP'd at the end of the season to ensure that water did not sit in them all winter. With no water present and no oxidation or corrosion happening, the gas will be fine next spring - assuming of course you get a dry fill after the VIP...
One option if you can't trust the dive shop to supply dry ait after the VIP may be to drain the tank, remove the valve and inspect it yourself in the fall and then get the official VIP and fill in the spring. Just remember to re-install the valve (hand tight is fine) and be sure it is closed to prevent any air circulation in the tank over the winter.
One option if you can't trust the dive shop to supply dry ait after the VIP may be to drain the tank, remove the valve and inspect it yourself in the fall and then get the official VIP and fill in the spring. Just remember to re-install the valve (hand tight is fine) and be sure it is closed to prevent any air circulation in the tank over the winter.
