Mr Worth I accidently came across this thread and then could not sleep because of my excitement. I bought an old National pressure canner #25 for 7 dollars and guess what it is the same one that you have. I had to go dig it out of the corner at 11pm just to check. A couple of questions what did you use to clean the metal to metal rims? And looking for gauges I came across granger and they had temp/pressure gauges which brings up 2 questions 1. why not use those 2. can you use a reduction fitting going from 1/4 to 1/8 without messing up the temp/psi readings? I found a new presto on sale but it can not take the heat without warping so I cannot use it with my gas burner outside which when it is hot I would like to do.
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