Hello again, Scott:
I'm not saying that the tank should transfer. Clearly, it should not. But ownership of the tank isn't the issue. Ownership of its contents are. Based upon your conclusion, he would own the propane if he owned the tank. Why would he not, because he doesn't own the tank?
excon
PS> (edited) The tank, no matter who owned it, WAS an attached appurtenance. The attachment does not give title to the tank, because it was leased. But I suggest that it does give title to the propane.