Merit Brass K410-64 Pipe Cross 4 in 304 Ss Fnpt 150 Psi

Product Description

The MERIT BRASS K410-64 is a 4-inch pipe cross fitting designed for plumbing and industrial piping systems that require reliable, corrosion-resistant connections. Constructed from 304 stainless steel, this cross fitting handles a pressure rating of 150 psi and features female national pipe taper (FNPT) end connections on all four ports. The cross configuration allows a single pipe run to branch in two perpendicular directions simultaneously, making it well suited for distribution manifolds, process piping, and similar multi-branch applications. Licensed plumbers and pipefitters are the typical installers of fittings in this size range.

This fitting is commonly used in residential and commercial plumbing, light industrial piping, and fluid distribution systems where a four-way branch connection is required. The 304 stainless steel construction makes it appropriate for water, mild chemical, and general-purpose fluid service in environments where carbon steel corrosion resistance would be insufficient. At 4 inches, this is a larger-diameter fitting typically found in main distribution lines rather than branch or fixture supply runs.

Key Features

• 304 stainless steel construction provides corrosion resistance for water and mild fluid service
• 150 psi pressure rating suitable for standard low-pressure piping applications
• FNPT end connections on all ports for compatibility with standard NPT threaded pipe and fittings
• 4-inch fitting size for main distribution or industrial branch piping
• Cross configuration enables four-way flow distribution from a single pipe junction

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 4-inch NPT threaded piping systems using standard 150-class threaded fittings.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC and local plumbing codes. Shut off and depressurize the piping system completely before threading or removing any fittings. Use an appropriate thread sealant or PTFE tape rated for the service fluid on all FNPT connections, and tighten to the fitting manufacturer-recommended engagement depth without over-torquing stainless steel threads. Inspect all joints for leaks before returning the system to service.