Larrynjr... You mentioned a few posts ago .........
I know it was hard to get a consistant flame in it and after an hour or so, when the tank got colder the volume would decrease significantly. The new one I ran for at least a hour with no sign of decreased volume.
When your tank gets low, and you are using a fair amount of gas, it is normal for the tank to frost up and give you decreased propane flow (lower pressure in the tank). When you have a full tank, this doesn't happen, so your experience with a near-empty tank, then a full tank, is normal. Make your judgements on your equipment with a full tank only.
I have lessened the effect from a frosty tank in the past by putting the propane tank in my slack tub (now I have ganged two small tanks together to avoid the problem). If you do put the tank in your slack tub (or some other tub), be sure it stays upright. You DO NOT WANT the tank to tip and deliver liquid propane to your forge. It would not be pretty.
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