Presto 09915 Pressure Cooker/Canner Overpressure Plug This is an O.E.M. authorized part Fits various Presto models OEM Part Number 9915 Fits the following models: 3066 3067 3093 3094 3111 3112 KF140 KF1359 Item is manufactured in United States Presto 9915 Over Pressure Plug Replaces parts 82117 & 33804. Used on Presto cookers and canners built after 1977 Steam is automatically released by the overpressure plug if the vent pipe becomes clogged and excess pressure cannot be released normally.