correct sterilization temperatures are reached and held, which requires a pot of a certain minimum size (able to hold 4 x 1 litre (US quart) jars) as well as absolutely guaranteed pressure and a way to adjust for altitude. See: “Pressure cookers vs pressure canners” on our canning site...
How Many Canning Jars Does It Hold? It holds 19 pint jars, or 7 quart jars, or 23 half pint jars. It holds 5 wide-mouth quart jars or 16 wide-mouth pint jars. If you can find the 1/2 gallon jars, it will hold 4 of them. Perfect for juices and sauces!