23 Qt Aluminum Pressure CannerPresto 23 Quart Pressure Canner Pressure canning is the only method recommended safe by the U. S. D. A. for low acid foods such as vegetables, meats and fish. The easy to read gauge automatically registers a complete range of processing pressures. Air vent cover lock allows pressure to build up only when the cover is closed properly and prevents the cover from opening until pressure is safely reduced. This Presto Pressure Canner also doubles as water