B K/mueller Industries 511-374HN Galvanized Reducing Coupling

Product Description

The B K/Mueller Industries 511-374HN is a galvanized steel reducing coupling designed to connect pipes of two different diameters in threaded piping systems. It transitions from a 1-1/2 inch female thread to a 3/4 inch female thread, making it a standard fitting for reducing line size within a run of pipe. This type of coupling is commonly installed by licensed plumbers and pipefitters working on water supply, gas distribution, or general mechanical piping systems. The galvanized finish provides corrosion resistance suited to exposed or damp environments. Each package contains 4 couplings.

This reducing coupling is used in residential and commercial plumbing and mechanical piping applications where a threaded connection must transition from 1-1/2 inch to 3/4 inch pipe. Typical installations include water distribution mains, branch lines, and general-purpose threaded pipe assemblies. The galvanized coating makes it appropriate for above-ground or indoor applications where corrosion resistance is required. It is sold in a package quantity of 4 units, making it practical for service vans and repair stock.

Key Features

• Reduces from 1-1/2 inch to 3/4 inch female threaded connection
• Galvanized steel construction for corrosion resistance
• Threaded ends for standard NPT pipe assembly
• Sold in a package quantity of 4 units
• Suitable for water supply, gas, and general mechanical piping systems

Compatibility

Designed as an OEM-style replacement fitting compatible with standard NPT threaded pipe systems using 1-1/2 inch and 3/4 inch pipe sizes.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable IPC or local plumbing code requirements. Shut off and depressurize the piping system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not overtighten threaded connections, as this can crack or distort the fitting.