ASC Engineered Solutions 11/2X1 BLK MI REDUCER

Both ends are female pipe thread (FPT): 1-1/2 inch FPT on the large end, 1 inch FPT on the small end. So it threads onto male pipe ends or nipples on both sides. If you need a male end on the smaller side, you want a reducing bushing or a hex bushing instead, not this coupling-style reducer.

This ASC reducer is UL/FM rated, which is what an inspector looks for on fire protection piping. It is standard weight malleable iron to ASTM A-197 with dimensions and pressure rating per ASME B16.3. Confirm the rated working pressure matches your system design before it goes in.

Black malleable iron is the finish here, and black fittings are used for gas, fire sprinkler, and closed-loop hydronic service, not for open potable water, where the uncoated iron corrodes. For domestic water runs, go galvanized or a different material. For black gas or sprinkler pipe, this is the matching fitting.

A reducing coupling takes female thread on both ends, so it joins two male pipe ends of different sizes, 1-1/2 inch down to 1 inch in this case. A bushing is male on the large side and female on the small side and screws into an existing female port, like a tee or valve. If you are stepping down inside a fitting you already have, you need the bushing. If you are joining two pipe runs, this is the part.

Standard weight (STD), built to ASME B16.3 for both dimensions and pressure class. If your drawing calls out Class 300 extra heavy malleable, this 150-class standard fitting is not the substitution, and you need the XH version.

Yes. Because it is dimensioned to ASME B16.3 with B1.20.1 threads, it takes the same face-to-face and thread engagement as any other conforming 1-1/2 x 1 standard malleable reducing coupling, regardless of who made it. Swapping one out for this ASC fitting does not change your pipe cut lengths.