Midland Industries 64776H Half Merchant Coupling 1-1/4 in

Product Description

The MIDLAND INDUSTRIES 64776H is a half merchant coupling designed to transition between a female pipe thread connection and a butt weld end in a single compact fitting. Built from galvanized steel, this 150-pound rated malleable iron fitting provides corrosion resistance in general plumbing, industrial piping, and mechanical systems. The FPT side conforms to ANSI B1.20.1 thread standards at 1-1/4 inch nominal with an 11-1/2 thread pitch. At 0.26 pounds and compact in profile, this fitting suits both new construction and retrofit applications where a threaded-to-weld transition is needed in tight spaces. Licensed plumbers and pipefitters are the typical installers.

This half merchant coupling is suited for use in low-pressure galvanized pipe systems rated at 150 pounds, including residential and light commercial water supply, gas distribution piping, and general mechanical piping. The butt weld end allows for field welding directly to Schedule 40 pipe or fittings of the same nominal size, while the FPT end accepts a standard male-threaded pipe or nipple. It falls within the Galvanized 150-pound malleable fittings category and is appropriate where a threaded-to-weld connection is required at a 1-1/4 inch pipe size.

Key Features

• Half merchant coupling configuration with 1-1/4 inch FPT on one end and butt weld on the other
• Galvanized steel construction provides corrosion resistance in wet and outdoor piping environments
• Thread conforms to ANSI B1.20.1 at 1-1/4 inch nominal, 11-1/2 TPI
• 150-pound malleable fitting rated for general plumbing and mechanical piping service
• Compact footprint at 1.8 inches in length and 1.85 inches in width for use in restricted spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for galvanized 150-pound malleable piping systems using 1-1/4 inch nominal pipe size with a threaded-to-butt-weld transition.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or IFGC codes. De-pressurize and drain the system completely before cutting into any existing line. The FPT end requires appropriate thread sealant or PTFE tape applied to the male threads being engaged. The butt weld end must be welded by a qualified welder using procedures appropriate for the service fluid and pressure class.