Yep. Easier sometimes though to just let the folks at the Extension Office do it if they are already set up for it.
Another safety feature I noticed on my Presto that I don't remember seeing on Mom's was a plug that popped up and locked the lid if there is any pressure remaining inside. Once the pressure inside normalizes with outside pressure, the plug drops and you can open the canner.
And actually, it probably wouldn't be that tough to add one of the over-pressure blowout plugs to a lid.
Another safety feature I noticed on my Presto that I don't remember seeing on Mom's was a plug that popped up and locked the lid if there is any pressure remaining inside. Once the pressure inside normalizes with outside pressure, the plug drops and you can open the canner.
And actually, it probably wouldn't be that tough to add one of the over-pressure blowout plugs to a lid.
Just weighing in here a bit. To find if the pressure gage is TOTALLY correct the gage would have to be tested against a known pressure, be it air or steam, It's not all that hard to just change out the gage because the thread on the gage will either be 1/8 NPT, or 1/4 NPT. ( just make sure the safe numbers correspond) In my opinion it's not necessary to worry about the gage if it looks to be in good condition, it more than likely is. If the gasket leaks when it starts to build up steam, then it's probably time to get a new gasket. Most pressure vessels have a safety device built into them. (something like a little screw-in device that will blow before the pressure gets above a safe level. My pressure cooker is maybe over 40 years old, & still doing great... Jim