[John DiBartolomeo]

Any welding supply should be able to refill it providing they have the ability to weigh the bottle. Weight is the only indication it is filled properly and not overfilled. An overfilled bottle can blow the safety blow-off should the bottle become too hot, such as when it's in the car, trailer, cabinet, etc. I can't tell you how many bottles we have to replace the blow-off on because someone over filled it.