Merit Brass K611H-24 Half Coupling 1-1/2 in 316 Ss Fnpt

Product Description

The MERIT BRASS K611H-24 is a 1-1/2 inch pipe half coupling machined from 316 stainless steel, designed for threaded pipe connections in demanding fluid and gas distribution systems. The female NPT (FNPT) end threads onto standard pipe to create a secure, leak-resistant joint rated to 150 psi. The 316 alloy provides superior corrosion resistance compared to 304 grade, making this fitting well-suited for environments with exposure to chlorides, chemicals, or moisture. Plumbers, pipefitters, and mechanical contractors install this type of fitting when joining or extending threaded pipe runs in industrial, commercial, and marine piping systems.

This half coupling is used in applications where only one end requires a threaded connection to pipe, such as branch takeoffs, pipe extensions, or welded assemblies where the opposite end will be socket-welded or otherwise joined. The ISO standard construction ensures dimensional conformity for compatibility with standard NPT threaded pipe and fittings. Typical applications include process piping, chemical handling lines, marine installations, food and beverage systems, and general plumbing where corrosion resistance is a priority.

Key Features

• 316 stainless steel construction for enhanced resistance to chlorides and corrosive media
• FNPT (female NPT) threaded end connection for standard pipe thread engagement
• 150 psi pressure rating suitable for a wide range of fluid and gas service applications
• ISO standard dimensioning ensures consistent fit with compatible threaded pipe and fittings
• Weighs 0.35 pounds — compact and easy to handle in tight installations

Compatibility

Designed as an OEM-style threaded half coupling for use with 1-1/2 inch nominal pipe size (NPS) threaded pipe systems conforming to standard NPT thread specifications.

Installation Notes

This fitting is installed by licensed plumbers or pipefitters in accordance with applicable mechanical and plumbing codes such as the IPC or ASME B31.3. Depressurize and drain the pipe system fully before disassembly or installation. Apply appropriate thread sealant or PTFE tape to the male threads before making up the joint — do not apply sealant to the first two threads. Torque to finger-tight plus wrench turns per standard pipe thread practice; avoid over-tightening, which can crack or distort stainless fittings.