Parts Not Illustrated and Optional Parts (Not Included) 978025 Valve, Access (1/4") 978026 Valve, Access (5/16") 978027 Valve, Access (3/8") 978028 Valve, Access (1/2") 978029 Valve, Access (5/8") 978030 Valve, Access (3/4") 876764 Valve, Access (3/16") Production Compressor Requires Production Electrical Components. Service Compressor Requires Service Electrical Components. For Further Information, Refer to Filmcard 19.1.