B K Mueller 511-706HN 1-1/4 in Galvanized Union Brass Iron 5 Pack

Product Description

The B K Mueller Industries 511-706HN is a 1-1/4 inch galvanized union constructed with a brass seat and iron body. Unions allow piping systems to be disconnected and reconnected without cutting or threading new pipe, making them a standard fitting in water supply, mechanical, and light industrial applications. This package contains 5 unions, sold as a unit. At 5.72 pounds per package, each union is built to withstand the physical demands of threaded galvanized pipe systems. Licensed plumbers and pipefitters install this type of fitting during new construction and retrofit work where future serviceability of a run is required.

This galvanized union is suited for residential and light commercial water supply and distribution piping where galvanized steel pipe is specified or already in use. Common install scenarios include water mains, branch lines, and equipment connections where the line may need to be broken for service or replacement. The brass seat provides a reliable sealing surface between the union nut and the two pipe ends, maintaining a leak-free joint in threaded iron pipe systems.

Key Features

• 1-1/4 inch nominal pipe size for use with standard NPT threaded galvanized pipe
• Brass seating surface paired with iron body for corrosion resistance at the joint interface
• Galvanized finish provides external corrosion protection in exposed or damp environments
• Sold in a package of 5 units, reducing per-unit cost on multi-connection jobs
• Standard union design allows pipe runs to be broken and rejoined without cutting

Compatibility

Designed as an OEM-style replacement and standard fitment for 1-1/4 inch NPT threaded galvanized steel pipe systems in residential and commercial plumbing applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the water supply before disassembling or installing any union fitting. Apply an approved pipe thread sealant or PTFE tape to all male NPT threads before assembly. Do not overtighten the union nut, as excessive force can crack the brass seat or distort the iron body.