ASC Engineered Solutions 3X11/4 GALV MI REDUCER

It steps 3 inch pipe down to 1-1/4 inch, with female pipe threads (FPT) on both ends. Both openings are tapped, so it threads onto male pipe ends or nipples, not over them. Threads follow ASME B1.20.1 NPT, so it mates with standard NPT-threaded steel or iron pipe.

Yes, the 3 x 1-1/4 galvanized malleable iron reducer carries UL/FM recognition, which is what an inspector looks for on a wet or dry sprinkler line. It is standard (STD) class, dimensioned and pressure rated to ASME B16.3.

The galvanizing is hot dip to ASTM A-153, the coating spec used for corrosion protection on iron fittings, so it suits wet sprinkler lines, damp mechanical rooms, and exposed runs. The body itself is malleable iron to ASTM A-197. For potable water, galvanized iron is not the right choice; use brass or a listed potable material instead.

This part is a reducer with both ends female threaded, so it does the size change in one fitting between two male pipe ends. A hex bushing would be the alternative, but a bushing is male on the large end and screws into a female port such as a tee or valve. Pick by what is on the pipe: two male ends calls for this reducer, a female port calls for a bushing.