All High Quality Pressure Canner for Home Canning 21.5 Quart. Pressure canning is the only method recommended safe by the .D.A. for low-acid foods such as vegetables, meats and fish.No matter how high you turn up the heat, boiling water cannot surpass 212F (even lower at high altitudes). Our High-Quality Pressure Canners bring jar temperatures up to 250F at just 15 lbs sq. in. Simple and safe to use. 1-year warranty, UL approved. . Note: Glass-top ranges are not designed for the high heat of canning.