A Complete replacement Valve to fit all pre 1998 Duromatic Pressure Cooker models To check the year your Pressure Cooker was manufactured look on the base of the cooker, it will read Date/ Year E.G. 09/06. If your Pressure Cooker was manufactured post 1998, follow this link to purchase a post 1998 Valve. We have listed our full range of Pressure Cooker spare parts. If you have a query or can't find the spare part you need please contact us.