ASC Engineered Solutions 21/2X11/2 BLK MI REDUCER

It takes 2-1/2 inch pipe on the large end down to 1-1/2 inch on the small end. Both ends are FPT (female pipe thread), so it threads onto male-threaded pipe nipples or fittings on each side, cut to ASME B1.20.1 NPT threads.

No. Black malleable iron is the uncoated version, meant for gas, fire protection, compressed air, and low pressure steam or condensate. For potable water you want galvanized malleable iron, copper, or CPVC instead, since bare black iron will rust in a wet domestic line. If the job is black iron gas piping or a threaded sprinkler system, this 2-1/2 x 1-1/2 reducer is the correct family.

A reducer such as the ASC 2-1/2 x 1-1/2 has female threads on both ends and its own body length, so it makes the size change between two lengths of pipe or nipples. A bushing has male threads outside and female inside and drops into an existing female port, taking up almost no space. Use the reducer when you are joining pipe to pipe; use a bushing when you are reducing inside a fitting you already have.

The casting meets ASTM A-197, the standard for cupola malleable iron used in threaded pipe fittings. Dimensions and pressure class follow ASME B16.3, and the fitting is standard weight rather than extra heavy. It weighs 2.09 lbs.