I have a local dealer I like, and I think they are a Suburban dealer. They have about an acre of residential style tanks and LP is all they do. I guess when and if they ever refuse to fill a tank I'll just ask them.
I have never seen a pile of small tanks as "scraps" - always a few around the refill station but I just assumed they were dropped off, filled and waiting for the owners to pick them up. Or maybe part of an informal "exchange" program. Some of them looked a lot better than others.
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