I bought my first Presto Pressure canner in 30 years ago, and besides replace the gasket it has worked like a charm. I bought a new one for my daughter to start canning this year.  We will be going strong with two on the burner! Super product! Each gage varies, you can take your lid with the gauge on it to your local county extension office to test the gauge for accuracy, mine is become a little off over the years so I get it test every other year. When it reads 13 lbs of pressure it’s really only 11, so I adjust it by two lbs when using it. Love my presto!