Midland Industries 65776H Half Merchant Coupling 1-1/4 in

Product Description

The MIDLAND INDUSTRIES 65776H is a half merchant coupling designed for connecting threaded pipe to a welded pipe end in black steel piping systems. One end accepts a 1-1/4 inch female pipe thread (FPT) connection conforming to ANSI B1.20.1 thread standards at a 1-1/4-11-1/2 thread specification. The opposite end is a butt weld connection sized at 1-1/4 inches, allowing direct weld attachment to schedule pipe. Constructed from black steel, this coupling is rated for 150-pound malleable fitting service. It is installed by licensed pipefitters, plumbers, and mechanical contractors in both residential and commercial piping applications where a transition from threaded to welded pipe is required.

The 65776H is suited for use in low-pressure steam, water, and gas distribution lines where 150-pound black malleable fittings are specified. Its half-coupling form factor allows it to be welded onto a pipe run while accepting a threaded branch or pipe nipple from the FPT end. Typical installation scenarios include mechanical rooms, boiler connections, and industrial process piping where mixed threaded and welded pipe configurations are present.

Key Features

• 1-1/4 inch FPT connection conforms to ANSI B1.20.1 thread standard
• 1-1/4 inch butt weld end for direct weld attachment to schedule pipe
• Black steel construction rated for 150-pound malleable fitting service
• Half-coupling design enables branch connections on threaded-to-welded transitions
• Compact profile at approximately 1.8 inches in length and 1 inch in height

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 150-pound black malleable iron and steel piping systems using 1-1/4 inch pipe connections.

Installation Notes

Installation should be performed by a qualified pipefitter or licensed plumber in accordance with applicable mechanical and plumbing codes including the IPC and IFGC. De-pressurize and drain the piping system completely before cutting, threading, or welding any fitting. The butt weld end must be properly cleaned, beveled, and welded by a qualified welder to ensure a pressure-tight joint. Apply appropriate thread sealant to the FPT end per local code requirements.