ASC Engineered Solutions 2X1/2 BLK MI REDUCER

Both ends are FPT, so this is a female-to-female bell reducer. The large end takes 2 inch male pipe thread and the small end takes 1/2 inch. Threads are cut to ASME B1.20.1 (NPT), so it mates with standard threaded black steel pipe nipples. If you need to come off a male outlet, you'll want a bushing or a nipple instead.

Black malleable iron fittings are the standard choice for black iron gas piping, and this 2 x 1/2 reducer is standard weight (STD) malleable iron made to ASTM A-197, dimensioned and pressure rated to ASME B16.3. It is not galvanized, so keep it off potable water. Local gas code still governs the installation and the pressure class you need.

Yes, the 2 x 1/2 black malleable iron reducer carries UL/FM. That matters if you are picking up a sprinkler drop or a gauge/drain connection off a 2 inch line and the AHJ wants listed fittings throughout.

A bell reducer has female threads on both ends, so it threads onto a 2 inch male nipple and gives you a 1/2 inch female outlet. A hex bushing is male on the large end and threads into a female port like a tee or coupling. Same size change, opposite geometry. Pick based on whether what you are reducing from ends male or female. The reducer also seats a wrench on its body rather than on a hex at the large end.

Order manufacturer part number 310089800 from ASC Engineered Solutions. That is the 2 inch by 1/2 inch black malleable iron reducer, standard weight.

1.3 lbs each. Worth knowing if you are loading out a sprinkler or gas rough-in by the box and figuring hanger loads on a long threaded run.

NPT threads to ASME B1.20.1 are tapered and seal metal to metal on the flanks, but they are not intended to go in dry. Use pipe dope or PTFE tape rated for the service, and on gas work use a sealant approved for gas.