Do u refill helium tanks?

I don't think they refill them but they do sell them. Call to verify

No, they do not refill helium tanks, only propane.

I have never seen them do it

They don't do refills on helium tanks but just to be in the safe side. Go down to the store and find out

they may do exchanges but not refills. i know when i with for a company they had there's refilled by another company. most won't because of the danger. call ahead just in case. hope this helps