F.I.P. & M.I.P. fittings Home › Forums › Archives › Old Bulletin Board Archives › F.I.P. & M.I.P. fittings This topic has 2 replies, 2 voices, and was last updated 24 years, 9 months ago by John Davis. Viewing 2 reply threads Author Posts 24 Oct 1999 at 11:49 am #284791 [email protected] What does F.I.P. & M.I.P. fittings mean? Can they only be connected to certain fittings? Can they be used in a Propane supply system? Thanks for help. 24 Oct 1999 at 4:08 pm #308422 John DavisParticipant : What does F.I.P. & M.I.P. fittings mean? Can they only be connected to certain fittings? Can they be used in a Propane supply system? : Thanks for help.Male/Female Iron Pipe 24 Oct 1999 at 4:08 pm #308424 John DavisParticipant If a propane system has iron pipe, it would have male and female iron pipe fittings. Author Posts Viewing 2 reply threads The forum ‘Old Bulletin Board Archives’ is closed to new topics and replies.