Gas Valve Throttle Housing Screw Gasket Compression Spring Compression Spring Compression Spring Poppet Valve Valve Seal Valve Stem Valve Stem Retaining Ring Retaining Ring Valve Seal O ring O ring Poppet Valve Poppet Valve Head Part not known Gas Filter Gas Inlet Washer Gas Pipe Screw Poppet Valve Head O ring Compression Spring Retaining Ring Poppet Valve Head Valve Operation Housing Screw Guide Plate Gasket Screw Diaphragm Switch Pilot Solenoid Main Solenoid