I am looking for a simple hose to connect a couple propane tanks together. Specifically I am looking to use either the 20 lb or 40 lb tank to fill my 5 lb tank. All three have the same valves on them. I need a hose that threads into both tanks to connect them together. I've tried multiple times at the hardware store, and the guys look at me like I have horns growing out of my head. They can't seem to understand that I do not want the 1 lb tank adapter, I want to connect two portable tanks together. I don't need any valves or bleeders, I only need a hose. Can anyone point me in a direction on where to find one, or at least what it would be called. "propane tank hose extension" and "propane tank connector" do not find anything.