Merit Brass C111-16 Brass Coupling 1 in Fnpt Class 125

Product Description

The MERIT BRASS C111-16 is a Class 125 brass pipe coupling with female NPT connections on both ends. It is designed to join two sections of threaded pipe in a straight run, maintaining a leak-resistant seal under moderate pressure service. The 1-inch FNPT x FNPT end connections accept standard tapered male pipe threads. This coupling is commonly installed by plumbers and pipefitters in water supply, compressed air, and general-purpose fluid systems where a reliable, all-brass inline fitting is required.

This coupling is suited for residential and light commercial plumbing, HVAC condensate and hydronic piping, compressed air distribution, and industrial fluid handling where Class 125 brass fittings meet the design specification. Its all-brass construction resists corrosion in water and many common fluid services, making it a practical choice for both new installations and repair work on existing threaded pipe systems.

Key Features

• 1-inch FNPT x FNPT end connections accept standard tapered male pipe threads on both sides
• Class 125 pressure rating suitable for water, air, and compatible fluid services
• All-brass construction provides corrosion resistance in wet and humid environments
• Straight coupling design joins two pipe sections inline without change in direction or size
• Compact form factor for use in tight pipe chases and mechanical spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting compatible with 1-inch male NPT threaded pipe and fittings in Class 125 brass piping systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters. Shut off and depressurize the supply line before threading the coupling onto the pipe. Apply thread sealant tape or paste to the male threads before assembly and tighten to hand-tight plus the appropriate number of turns per applicable IPC or local plumbing code requirements. Do not overtighten, as brass threads can be damaged by excessive torque.