On 8/31/2011 11:28 AM, Frank wrote:

You should also be made aware that they sell 15 pounds of propane in a
tank designed to hold about 20 lbs

Well aware of that. I actually never do the exchange anymore because of
this, and no one I know does either. I take the empty tank over to a gas
station for refilling. But I could not take the bad tank there for
refilling, I needed one that worked properly.

Even when refilled to capacity, it's not really 20 pounds, more like
around 18 pounds. They charge $20 to fill it, versus about $17 for a 15
pound exchange, so the cost savings isn't that much for doing a refill.