Can a pressure canner be used on a smooth top range?
For a pressure canner to work successfully on a smooth top range, the canner bottom must be flat and in contact with the cooktop. Most heavy cast aluminum canners meet these specifications. Lighter weight stamped aluminum canners have a concave bottom. If the concavity is greater than one-eighth inch, the canner will not perform effectively. To measure the concavity, place a straight edge across the bottom and measure the distance to the canner bottom with a ruler. Because the heat beneath the canner is not uniform, smooth top ranges are not the best choice for home canning.
Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia
Last update: Tuesday, May 05, 2009