This Presto Pressure Regulator is the 3 piece weight set needed to convert a Presto 16 or 23 quart pressure canner from a gauged to a weighted canner. It consists of a 3 piece weight set of 5-10-15 pound weights. 2 parts are rings that slip on to the 3rd stemmed piece which sits on the steam valve..
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 s..