4-quart Pressure Cooker
Model number A409 is a 4 Quart Pressure Cooker but is quite rare. Before continuing, be sure you have the correct model number. If the number on your cooker is 409A rather than A409, there is a good chance you have the wrong model number. 409A is a listing number issued by Underwriters Labratory. This appears on all Presto® Pressure Cookers. If you're not sure, please examine your pressure cooker to determine it's model number. It will be something other than 409A.