I have been canning for more years than I want to remember. If your canner is not new, I recommend that you contact your local County Extension Office and see if they will check it for you. Ours will check your canner out and tell you if the gasket needs replaced or if any of the pressure gauges or plugs need replacing. They will also tell you if your pressure canner is a safe model.
A web site that has a lot of canning info and links to canning forums, etc.,
http://www.topica.com/lists/justjeanne49/read. This will take you to the newsletter archives where you can get a good idea of what Just Jeanne is all about. She has some really good information on choosing your jars and how to can safely
I hope this helps.
God Bless and Happy Canning
__________________
When things get tough, always remember....
Faith doesn't get you around trouble, it gets you through it!!