[Worth1]

Originally Posted by loulac

Sensible users will always check the size of the flame under the canner, it's supposed to heat the bottom and not the sides. In a former thread on this topic a highly qualified Tvilian demonstrated with math that a vent could only evacuate a given quantity of steam at a given pressure. Too much heat could make a canner explode, even if the valve was juggling at its maximum speed.

I have seen mine on high go up to 5 pounds with the weight off.
But my high isn't very high.
You would think to over pressure plug would blow before the canner exploded.
even my old one have over pressure valves and one even has a second over pressure plug on top of the valve.
This give it three hole to blow steam out of.
Then there is the consideration of extreme heat.
Aluminum melts at around 1,200 degrees F.
It would lose its integrity before that.

Putting an aluminum canner on a super hot fire like those giant outside burners that sound like a jet engine running is a very dangerous game to play.

Worth