Merit Brass K411H-04 1/4 in Pipe Half Coupling 304 Ss

Product Description

The MERIT BRASS K411H-04 is a 1/4 inch pipe half coupling designed for threaded pipe connections in plumbing, HVAC, and industrial piping systems. Constructed from 304 stainless steel, this fitting provides corrosion resistance in both wet and dry service environments. The female NPT (FNPT) end threads onto standard NPT pipe or fittings, making it a straightforward mechanical connection. At a pressure rating of 150 psi and conforming to ISO standards, the K411H-04 is suited for low-to-medium pressure applications where a reliable, leak-resistant joint is required. Licensed plumbers and pipefitters are the primary installers of this type of fitting.

The K411H-04 half coupling is used in residential and light commercial piping installations where a branch connection or pipe extension is needed on one end only. Its 25/32 inch length makes it compact enough for tight installations. Common applications include water supply lines, compressed air distribution, and process piping where stainless steel is specified for corrosion resistance or sanitary requirements. The FNPT connection is compatible with standard NPT-threaded pipe and fittings across these system types.

Key Features

• 304 stainless steel construction for corrosion resistance in wet and process environments
• FNPT end connection threads directly onto standard NPT pipe or fittings
• 150 psi pressure rating suitable for low-to-medium pressure service
• Conforms to ISO standards for dimensional consistency
• Compact 25/32 inch length fits restricted installation spaces
• Half coupling design for single-end threaded branch or extension connections

Compatibility

Designed as an OEM-style threaded half coupling for use with 1/4 inch NPT pipe and fittings in standard plumbing, HVAC, and industrial piping applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable local plumbing codes and the IPC. Shut off and depressurize the system before making any threaded connections. Apply an approved thread sealant or PTFE tape to the male NPT threads before assembly. Do not over-tighten threaded stainless steel fittings, as galling of the threads can occur.