Midland Industries 79543 Pipe Bushing 4x3 in Mpt Fpt Aluminum

Product Description

The MIDLAND INDUSTRIES 79543 is an aluminum pipe bushing used to reduce a 4-inch male pipe thread (MPT) connection down to a 3-inch female pipe thread (FPT) connection. Bushings of this type are threaded fittings that allow technicians to join pipes or components of different diameters within the same threaded pipeline. The 79543 is machined from aluminum, making it a lightweight, corrosion-resistant choice for plumbing, HVAC, and industrial piping assemblies. The 4-8 thread specification is standard for fittings of this diameter range. Plumbers, pipefitters, and mechanical contractors typically install this fitting during system assembly or repair.

This bushing is suited for use in residential and commercial piping systems where a reduction from 4-inch to 3-inch threaded pipe is required. Common applications include water distribution headers, HVAC condensate or air-handling piping, and general industrial fluid conveyance lines. Aluminum construction makes it well-suited for non-ferrous piping assemblies and environments where weight or corrosion resistance is a consideration. It is installed in-line wherever a 4 in MPT to 3 in FPT transition is needed in a threaded pipe run.

Key Features

• Reduces 4-inch MPT to 3-inch FPT in a single threaded fitting
• Aluminum construction provides corrosion resistance and reduced weight
• 4-8 thread specification for standard compatibility in large-diameter threaded systems
• Hex-body design typical of this bushing class allows installation with standard pipe wrenches or strap wrenches
• Minimum order quantity of 1 unit

Compatibility

Designed as a standard-thread aluminum pipe bushing for use in 4-inch MPT to 3-inch FPT threaded piping assemblies across plumbing, HVAC, and general industrial applications.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter. Shut off and depressurize the system before removing or installing any threaded fittings. Apply appropriate thread sealant or PTFE tape to the male threads before assembly. Follow applicable codes such as the IPC or IFGC for pipe thread engagement and sealant requirements in your jurisdiction.