When I was asking if you were pressure canning anything, I didn't mean jams... LOL, those I can do in my stock pot. I tell ya though, I hate this flat surface range I have. I was waiting for ever for the stock pot to come to a boil yesterday, and got so made, I used my soup pot... Then I realised the stock pot has a concave bottom. Well no freaking DUH! LOL.
I just made two blueberry pies... home made. I feel like a "Suzie homemaker" this weekend!
You mention "flat top range". Alarm bells just went off. Most glass/ceramic top ranges are NOT to be used for canning, the warranty can be voided. In fact, for the All American, it specifically states glass top ranges not recommended. There are a few reasons, the major being weight & heat distribution. Most things I have read say that the pot/pan on a flat top should not overhang the burner by more than 1". I have read on many posts that people have used their flat tops with no probs. What I am warning about comes from the manufacturer's manuals that came with my AA & Presto.
While I do get a lot of helpful info from posts, on many subjects I do find there are opposing viewpoints (I.e., don't believe everything you read online !). Before you buy a pressure canner, please read the manual re: canning on flat surfaces.
A workaround is just what RaZ said above, a propane burner. I have read on many canning sites that is what a lot of people with flat top ranges have purchased for their canning needs.
Now. Water bath vs. Pressure canning.
The first couple of pages in the Ball Blue Book "Learning About Canning" does a fabulous job explaining why we water bath vs. pressure cook. It has to do with destroying molds, yeasts, bacteria, etc., without compromising the food's quality.
Temperature & the acidity of the food being canned is key.
High-acid foods (pH 4.6 or less) are generally water bathed cuz the main concern is molds & yeast (212 degrees destroys this).
Low-acid foods need 240 degrees at the specified processing time to prevent the growth of certain bacteria (salmonella, staph, botulism), hence the need for a pressure cooker.
I tried to find these few pages online, cuz there are nice diagrams that help explain, but can't find it. I guess I could scan them & see if I can post.
I truly did do a lot of research before beginning to can more than just preserves & tomatoes & salsa. While it is not hard to do once you get started & do it a few times, I believe it is very important to understand the "why" behind the different methods to ensure food safety.
Sorry for the long post.....I am a morning person & tend to babble...
