Midland Industries 65780 Merchant Coupling 3in Fpt Steel

Product Description

The MIDLAND INDUSTRIES 65780 is a 3-inch female pipe thread (FPT) by 3-inch FPT merchant coupling for use in black malleable iron pipe systems rated at 150 pounds per square inch (psi). Constructed from steel with a black finish, this fitting connects two sections of pipe at equal diameters without reducing flow path. The threaded ends conform to ANSI B1.20.1 standards, ensuring consistent thread form and fit across standard pipe assemblies. Plumbers and pipefitters install this coupling in gas distribution, industrial piping, and commercial plumbing systems where a reliable, pressure-rated threaded connection is required.

This coupling is suited for residential and commercial pipe installations using black steel pipe at 3-inch nominal diameter. It is commonly found in gas supply lines, fire protection rough-in work, and industrial fluid conveyance systems. The 150-pound malleable fitting classification places it in the standard service range appropriate for most low- to medium-pressure black pipe applications. Installers working on steam, gas, air, or water systems will find this fitting compatible with standard 3-inch black pipe runs.

Key Features

• 3-inch FPT x 3-inch FPT connection accepts standard black steel pipe on both ends
• ANSI B1.20.1 compliant thread form ensures consistent fit with conforming pipe threads
• 150-pound malleable fitting rating suitable for standard-pressure pipe systems
• Steel construction with black finish for corrosion resistance in typical pipe environments
• Overall dimensions of 3.9 inches wide by 3.25 inches in length for compact inline installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 3-inch black malleable iron pipe systems rated at 150 psi, conforming to ANSI B1.20.1 thread standards.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable codes such as the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC). Depressurize and isolate the pipe system fully before cutting in or replacing any threaded fitting. Apply appropriate thread sealant or PTFE tape to all male threads before assembly, and tighten to hand-tight plus sufficient wrench turns to achieve a leak-free joint. Inspect all connections with appropriate leak-detection solution before returning the system to service.