Ay Mcdonald 5422-432 Threaded Brass Union 3 Inches

Product Description

The AY MCDONALD 5422-432 is a 3-inch threaded brass union designed for joining sections of pipe in plumbing and mechanical systems. Brass unions allow two pipe ends to be connected and disconnected without rotating either pipe — a key advantage in tight service spaces or systems that require periodic disassembly. Weighing 7 pounds, this union is built to handle the demands of commercial and residential installations where a reliable, leak-free threaded connection is required. Licensed plumbers and pipefitters are the primary installers for fittings of this type.

This 3-inch threaded brass union is suited for use in water distribution, heating, and mechanical piping systems where brass is the specified material. At 3 inches, it fits larger-diameter pipe runs common in commercial plumbing, boiler rooms, and institutional settings. The threaded end connections allow installation without soldering or specialized tooling beyond a pipe wrench, making it practical for retrofit and service work.

Key Features

• 3-inch threaded end connections for tool-accessible assembly and disassembly
• Brass construction offers corrosion resistance in wet piping environments
• Union design allows line separation without disturbing adjacent pipe sections
• Weighs 7 pounds — sized for larger-diameter commercial and industrial pipe runs
• Order increment of 1 for single-unit purchasing flexibility

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3-inch threaded pipe connections in residential and commercial plumbing and mechanical systems.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off water supply and depressurize the line before removing or installing any union fitting. Apply appropriate thread sealant or PTFE tape to all threaded connections before assembly. Do not overtighten threaded brass fittings, as brass threads can be damaged by excessive force.

Technical Specifications

• Size: 3 inches
• Connection Type: Threaded
• Material: Brass
• Weight: 7 pounds
• UPC: 675135039692

Standard Information

• Brand: AY MCDONALD
• Manufacturer Part Number: 5422-432