1970 - 1/4" NPSMF 1/4" NPTF
1971 - 3/8" NPSMF 3/8" NPTF
1972 - 3/8" NPSMF 1/2" NPTF
1973 - 3/8" NPSMF 1/2" NPTF
1997 - 3/4" NPSMF 1/2" NPTF
1974 - 3/4" NPSMF 3/4" NPTF
1968 - 3/4" NPSMF 1" NPTF
1983 - 1" NPSMF 1/2" NPTF
1985 1" NPSMF 3/4" NPTF
1993 1" NPSMF 1" NPTF