Did you post an image to you All American Canner? Or a link to it?
If it’s like mine, I cannot fathom it creating a vacuum because the weight on the vent is what controls the pressure.
I got the 9:15, it’s a smaller one and you can’t Double Stack it. I’ll try to find a link. But it sounds the same, when the pressure goes to zero then you take the weight off. And then it says to open the lid right away, or not to wait more than 3 minutes, maybe 5 minutes, I can’t remember the exact directions.
I’m very happy to be wrong! I got this from the All-American website. I was looking for written diretions because I didn’t want to post a video, that’s always a pain to watch if you’re just looking for a little bit of information. Now the video I did watch I thought came from the All-American website, I’ll go back and check but I would trust written directions better.
So the way I read this is what you said, as long as you remove the pressure regulator there won’t be a vacuum.
“When the pressure regulator
weight is left on, a vacuum may
form inside the cooker making the
cover difficult to remove. To avoid a
vacuum, which will cause the cover
to be drawn to the bottom very
tightly, you must remove the pres
sure regulator weight from the vent
pipe as soon as the pressure gauge
indicator reaches zero P.S.I. and then
remove the cover. The longer you
wait without removing the pressure
regulator weight, the more vacuum
will form, pulling the cover tighter
and tighter to the bottom.
Another reason that a cover sticks
to the bottom is that the metal-tometal seal has been permitted to
build up a coating of foreign material
such as dried grease, lubricating oil,
etc. Please refer to page 7 under the
section “Metal-to-Metal Seal,
Cleaning and Maintenance” for
complete instructions”
I have one I nave not used but I do remember needing to put Vaseline on both top and bottom where they meet to keep that from happening.