Yes — FIP malleable iron pipe fittings can connect directly with NPT malleable iron pipe fittings because both share the same National Pipe Thread (NPT) standard. In practical engineering, FIP simply refers to the female threaded side of an NPT connection, while MPT (or MIP) refers to the male threaded side. This design ensures easy compatibility and secure sealing in industrial pipin... https://archpipes.com/news/company-blogs-en/can-fip-malleable-iron-pipe-fittings-connect-with-npt-malleable-iron-pipe-fittings/