Quote Originally Posted by Brian Ski View Post
If it is your bottle... You take it in and have it filled... You have to pay to have it re certified about $20-40 depends on the place. Now if it has your gas places name on it and you just swap them they don't care.

I just picked up a used tank and digging in the garage found another bottle of Argon in the corner. Well now I have 2. Nice to have a spare. Tanks will last quite a while using them unless you are have quite a long welding session going on. I guess my problem if I had one tank, is if it was less than half full on a Friday would I fill it or risk running out on the weekend. Nice to have a spare.

BTW if you lws fills tanks. They should fill any tanks if they are in date. Mine will. But they won't swap any tanks but their own.
Thanks, good info.