This matter of refusal to fill older propane tanks of the Vanagon type came
up about three weeks ago. You might try the archives. The bottom line seems
to be that the "new regulations" do not apply to our tanks. I have printed a
copy of the regulations which I carry in my glove compartment as a "just in
case" not that some know it all would take the time to read it. I have not
had the occasion to have mine refilled yet, but the place which I would use
seems to have an intelligent service person who knows how to fill one to
begin with.