Merit Brass K611H-04 Half Coupling 1/4 in 316 Ss Fnpt

Product Description

The MERIT BRASS K611H-04 is a 1/4 inch pipe half coupling designed for threaded pipe connections in plumbing, industrial, and mechanical systems. Constructed from 316 stainless steel, it offers strong resistance to corrosion and oxidation, making it well suited for harsh or wet environments. The female NPT (FNPT) end threads onto standard NPT pipe or fittings, providing a secure, leak-resistant joint. Rated to 150 psi and manufactured to ISO standards, this half coupling is a reliable choice for technicians and pipefitters working with small-diameter stainless steel piping systems.

This half coupling is commonly used in residential and light commercial plumbing, HVAC, and industrial piping applications where a pipe run must be connected to a valve, fitting, or equipment port without a full coupling. The 316 stainless steel material is frequently specified in applications involving exposure to moisture, mild chemicals, or outdoor environments. Licensed plumbers, pipefitters, and mechanical contractors typically install this type of fitting in new construction and retrofit work where a corrosion-resistant threaded connection is required at 1/4 inch pipe size.

Key Features

• 316 stainless steel construction provides excellent corrosion resistance for demanding environments
• FNPT threaded end connection for compatibility with standard NPT pipe and fittings
• 150 psi pressure rating suitable for low-to-medium pressure piping systems
• Manufactured to ISO standards for consistent thread form and dimensional accuracy
• Compact half coupling design for space-restricted installation points

Compatibility

Designed as an OEM-style threaded fitting for use with standard 1/4 inch NPT pipe systems in plumbing and industrial piping applications.

Installation Notes

Installation of this fitting is typically performed by a licensed plumber or pipefitter. 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 to ensure a leak-free joint. Follow applicable IPC or local plumbing code requirements for pipe material compatibility and pressure system testing after installation.