Midland Industries 65777H Half Merchant Coupling 1-1/2 in

Product Description

The MIDLAND INDUSTRIES 65777H is a half merchant coupling designed for connecting threaded pipe to a butt weld joint in black steel piping systems. The fitting accepts a 1-1/2 in female pipe thread (FPT) on one end and a 1-1/2 in butt weld connection on the other, making it a transition point between threaded and welded piping runs. Manufactured from black steel and rated within the 150-lb malleable fitting class, the 65777H conforms to ANSI B1.20.1 thread dimensional standards. Plumbers, pipefitters, and mechanical contractors install this type of fitting in gas, water, and general industrial piping applications.

This half merchant coupling is suited for residential and light commercial piping installations where a transition from a threaded pipe segment to a welded pipe section is required. It fits into black iron piping systems commonly found in natural gas distribution, fire suppression rough-in, and general mechanical piping. At 0.31 pounds and compact overall dimensions, it is a standard stock fitting for pipefitters working on 150-lb malleable iron and steel systems.

Key Features

• 1-1/2 in FPT inlet threads conform to ANSI B1.20.1 with a 1-1/2-11-1/2 thread form
• 1-1/2 in butt weld outlet for transition to welded pipe runs
• Black steel construction rated for 150-lb malleable fitting service
• Compact profile: 1 inch height, 2.1 inches length, 2.1 inches width
• Lightweight at 0.31 pounds for easy handling during installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/2 in black steel piping systems using 150-lb malleable fittings in threaded-to-welded transition applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes, including IFGC and IPC requirements for the piping system type. Shut off and depressurize the piping system fully before cutting into any existing line. Apply appropriate thread sealant or tape to the FPT threads before assembly; the butt weld end must be welded by a qualified welder following applicable welding procedures. Do not overtighten the threaded connection or use the fitting beyond its 150-lb pressure class rating.