Merit Brass C112-1206 Brass Reducing Coupling 3/4x3/8 Fnpt

Product Description

The MERIT BRASS C112-1206 is a brass pipe reducing coupling designed to connect two female NPT-threaded pipe sections of different diameters in a single inline fitting. It transitions from a 3/4 inch FNPT inlet to a 3/8 inch FNPT outlet, making it a direct, low-profile solution for reducing pipe runs without adding additional fittings. Rated Class 125, this coupling handles standard working pressures common in water, light oil, and air service lines. At 0.25 pounds, it is compact and easy to handle during installation. Plumbers and pipefitters use this fitting in both new construction and retrofit applications where a threaded pipe size reduction is required.

This reducing coupling suits residential and light commercial plumbing, compressed air distribution, and general fluid-handling systems that use NPT-threaded pipe. It is appropriate wherever a pipe run must step down from 3/4 inch to 3/8 inch without the use of a union or additional adapter. The all-brass construction resists corrosion in water and many common fluid services, making it a reliable choice for mechanical rooms, utility connections, and panel supply lines.

Key Features

• Reduces 3/4 inch FNPT to 3/8 inch FNPT in a single inline coupling
• Class 125 pressure rating suitable for water, air, and light oil service
• Threaded FNPT x FNPT end connections for tool-only, no-solder installation
• Brass construction provides corrosion resistance in common plumbing fluids
• Compact, lightweight design at 0.25 pounds for easy handling in tight spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 3/4 inch x 3/8 inch FNPT threaded pipe systems rated at Class 125 in plumbing, compressed air, and light fluid-service applications.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC and local plumbing codes. Shut off and depressurize the supply line completely before removing any existing fitting or installing this coupling. Apply thread sealant tape or pipe compound to the male threads being engaged, not to the female threads of this fitting. Do not over-torque; use a pipe wrench sized appropriately for 3/4 inch and 3/8 inch fittings and tighten to hand-tight plus the number of turns appropriate for the pipe material per jobsite practice.