The Betts FH4MS is a 4-inch steel adapter connecting a TTMA flange to a half coupler with standard NPT threads, rated for a 75 psi maximum allowable working pressure.
The Betts FH4MS Adapter connects a 4-inch TTMA flange to a half coupler with standard NPT threads. Its bolt pattern follows TTMA recommended practices, and the steel construction is rated for a maximum allowable working pressure of 75 psi (5.2 bar). This adapter is built for tank trailer piping connections requiring a flange-to-coupler transition.