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 see what they are saying.
You need to remove the WEIGHT to prevent the vacuum and that makes sense as it could block the air flow back into the canner.
And I can see why that needs to be done as soon as the pressure is at zero. Sometimes I just lift it a little to see if there’s any hissing or other indication there’s still pressure inside.
It’s not removing the lid that needs to happen right away.