ASC Engineered Solutions 21/2X21/2X3 GALV MI TEE

It's a reducing tee: two 2-1/2 inch ports and one 3 inch port. All three openings are female pipe thread (FPT), so it takes male-threaded pipe nipples or externally threaded fittings at every branch. Order by MPN 311056402.

Yes. The threads are cut to ASME B1.20.1, which is the NPT taper thread standard, so it mates with any standard-threaded steel pipe or nipple of the matching size. Use pipe dope or PTFE tape on the male threads as usual.

The fitting has one 3 inch port and two 2-1/2 inch ports, so the orientation is fixed by geometry, not by an up-or-down rule. If you need the 3 inch as the straight run with a 2-1/2 inch branch, that's a different configuration (3 x 3 x 2-1/2) and this fitting won't do it. Check which two ports are in line on your layout before ordering.

It's a standard (STD) strength fitting with pressure rating per ASME B16.3, the governing standard for threaded malleable iron fittings. Dimensions follow the same standard, so the center-to-end lay length matches any other B16.3 tee of these sizes if you're swapping out an existing fitting.

Galvanized is what you want on wet systems, potable-adjacent lines, and anywhere exposed to moisture, and it's the standard for galvanized-pipe sprinkler work. The zinc coating on this tee is applied to ASTM A-153 (hot-dip). Black malleable iron is the usual pick for dry gas and steam lines where the coating isn't needed. Don't mix galvanized fittings onto black pipe in a system spec'd one way or the other without checking the job requirements.

About 6 lbs. Worth knowing if you're hanging it overhead, since the fitting weight plus water-filled pipe drives your hanger spacing and the support you need either side of the branch.