Presto Overpressure Plug suits Presto 23 Quart Pressure Canner and Pressure Cookers

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The overpressure plus is used on Presto Pressure 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. Note that the overpressure plug should generally be changed at the same time as the gasket (and the sealing ring kit sold separately includes an overpressure plug) Show more