Why top off ? Because I hate looking for propane
In semi cold weather, my "full" LP goes 16-18 days
My black tank goes 17-18 days. When its full I have to move. I don't like having to move because I wasn't full on propane. And I really hate being in a strange town, looking for propane. But an extend a tank is a good way to go.
And no, not over filling, just topping off to the 80% full.
As far as no more filling propane tanks, lets get real.
Filling 1# bottles,.....a whole nother subject, and not for discussion amongst those that have a mind set against it.
I may try a gravity refill top off, just for the challenge if nothing else.