ASC Engineered Solutions 3/4X3/8 GALV MI 90 ELL

Both ends are female pipe thread (FPT), so it threads onto male NPT pipe nipples or male adapters on both sides. No soldering or grooving involved. Threads are cut to ASME B1.20.1, the standard NPT thread spec, so it mates with any standard threaded steel or brass pipe of the matching size.

It is a reducing elbow: one end takes 3/4 inch pipe and the other takes 3/8 inch. Use it where you need to turn a corner and drop down a size in one fitting instead of running an elbow plus a bushing. Both openings are female threaded.

It carries a UL/FM listing, which is what an inspector looks for on fire protection piping. The body is malleable iron to ASTM A-197 at standard (STD) pressure class per ASME B16.3. Confirm the pressure class on the drawing matches STD rather than an extra-heavy 300 class fitting before it goes in.

The galvanizing here is hot-dip to ASTM A-153, which is the coating spec written for threaded fittings and hardware, so it holds up in wet, damp, and exterior runs and in wet-pipe sprinkler service. Black malleable iron is the one to use on dry gas and dry-pipe work where the zinc is unnecessary. The finish does not change the dimensions, which follow ASME B16.3 either way.

Dimensionally yes. It is built to ASME B16.3, which fixes center-to-end lengths and thread engagement for malleable iron threaded fittings, so a same-size standard-class fitting from another maker drops into the same run. What varies between brands is the UL/FM listing; this one carries it, so if your spec calls for a listed fitting, check the replacement does too.

Order it as ASC Engineered Solutions part 311008007. Each fitting weighs 0.3 lbs, which is worth knowing when you are pricing freight on a full carton for an MRO restock.

NPT threads to ASME B1.20.1 are a tapered thread and rely on a sealant to make the joint. Use pipe dope or PTFE tape rated for the service media. The fitting itself ships bare, no sealant or gasket included.