Midland Industries 63459MS Reducing Coupling 1 in X 1/4 in Npt Ss

Product Description

The MIDLAND INDUSTRIES 63459MS is a reducing coupling designed to connect two female NPT threaded pipes of different sizes within a single inline fitting. It accepts a 1-inch female NPT on one end and a 1/4-inch female NPT on the other, allowing a step-down transition in a threaded piping system. Constructed from 316 stainless steel, it is suited for corrosive environments, including chemical process lines, marine plumbing, and food-grade applications. The fitting carries a 150 lb pressure class rating and is threaded to 1-11-1/2 NPT on the large end and 1/4-18 NPT on the small end. Plumbers, pipefitters, and industrial mechanics are the typical installers.

This reducing coupling fits into residential, commercial, and light industrial piping systems where a threaded size reduction is needed without additional adapters. The 316 stainless steel construction makes it a reliable choice in wet, salty, or chemically active environments where standard carbon steel or 304 stainless fittings may not hold up. It is compact enough for tight installations and rated for standard 150 lb service, making it appropriate for water, steam, and a range of compatible fluid systems at moderate pressures.

Key Features

• Reduces from 1-inch female NPT to 1/4-inch female NPT in a single fitting
• 316 stainless steel construction resists corrosion in harsh and wet environments
• 150 lb pressure class rating for moderate-pressure piping service
• Thread specifications: 1-11-1/2 NPT x 1/4-18 NPT for reliable sealing engagement
• Compact dimensions suit tight pipe chases and panel installations

Compatibility

Designed as an OEM-style threaded replacement fitting for 150 lb class female NPT piping systems requiring an inline reducing connection from 1 inch to 1/4 inch.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable IPC and ASME B1.20.1 thread standards. Always depressurize and drain the line before removing or installing threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads mating into this coupling. Do not over-torque stainless steel threads, as galling can occur and compromise the fitting.