Instruct: Classify a review as either positive or negative.
Query: Doesn't work as I expected

I bought the unit figuring that I would attach my 20 pound propane tank to the 1 pound canister and open the valve and that the pressure differential between the two would result in the one pound canister filling up to one pound, but after a few seconds of gas moving from one to the other it stops and only about .25 pounds of propane moves into the smaller container. I'd say it's not worth the money or time and I'll just buy new one pounders when I need them.