This kit replaces the pressure control weight and petcock originally packaged with canners of this type. The new 3-piece pressure regulator fits onto the new vent pipe and exhausts steam to help maintain proper pressure inside the unit. It consists of the pressure regulator body and two 5-pound weight rings. Completely assembled, it will maintain 15 pounds pressure. Includes: Regulator, Vent Pipe, and Recipe/Instruction Manual.