Quote Originally Posted by artcarney_agr View Post
There's bound to be a place near you that offers refills, especially with oxygen tanks being a common need for seniors. Maybe ask the local pharmacy if they know of a place?

It's been my experience that when it comes to oxygen or co2 tanks, it's usually an exchange program rather than them filling the one you've got.
Unless you own your tank and you can prove it, or you rent and it came from a welding supply company. Medical tanks are handled by medical supply companies and are much more strict than say a welding shop. IMO it is always best to rent a small welding tank or two and just exchange them as they empty.