B K/mueller Industries 511-375HN Galvanized Reducing Coupling

Product Description

The B K/Mueller Industries 511-375HN is a galvanized reducing coupling designed to connect pipes of two different diameters in a single inline fitting. It transitions from a 1.5-inch inlet to a 1-inch outlet, making it a practical choice for reducing flow path diameter within threaded pipe systems. The hot-dip galvanized finish provides corrosion resistance in wet or exposed environments. Plumbers and pipefitters install this fitting in water supply, drainage, and general-purpose piping systems where a concentric pipe-size reduction is required without adding additional fittings.

This reducing coupling is suited for residential and light commercial plumbing applications. It is commonly used in water distribution lines, irrigation systems, and mechanical room piping where threaded galvanized steel pipe is the specified material. The 1.5-inch by 1-inch size reduction is a standard transition found in supply branch lines, boiler rooms, and utility piping. Installers working with Schedule 40 threaded galvanized pipe will find this a direct-fit solution for inline diameter reduction.

Key Features

• Galvanized steel construction provides corrosion resistance in wet and exposed piping environments
• Reduces from 1.5-inch inlet to 1-inch outlet in a single inline fittingThreaded connections compatible with standard NPT threaded galvanized pipe
• Sold in a package of 4 units per order quantity
• Compact coupling profile minimizes added run length in tight installations

Compatibility

Designed as an OEM-style replacement and standard fitting for threaded galvanized steel pipe systems using NPT connections in residential and commercial plumbing applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off and depressurize the water supply before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to male threads before assembly, and tighten with a pipe wrench to proper engagement without over-torquing the fitting. Inspect threads for damage before installation to ensure a leak-free joint.