Merit Brass XNL187-02 Brass Pipe Union 1/8 in Fnpt Class 125

Product Description

The MERIT BRASS XNL187-02 is a 1/8 inch brass pipe union designed for threaded FNPT x FNPT connections in low-pressure fluid and gas piping systems. Rated at 125 psi and certified lead free, this Class 125 fitting is built for installations where code compliance and material safety are required. The three-piece union design allows technicians to disconnect and reconnect piping runs without cutting pipe or disturbing adjacent fittings. At 0.13 pounds, it is a compact, lightweight component suited for tight-clearance service work in both residential and light commercial applications.

This union is appropriate for use in water supply lines, compressed air systems, and low-pressure gas or fluid distribution where 1/8 inch NPT fittings are specified. It is commonly installed by licensed plumbers and pipefitters during new construction, renovation, or maintenance work requiring a break point in the piping run. The FNPT x FNPT end connections accept standard male-threaded pipe on both sides, making it straightforward to integrate into existing threaded systems.

Key Features

• Lead-free brass construction meets regulatory requirements for potable water contact
• 125 psi pressure rating suitable for Class 125 low-pressure service
• FNPT x FNPT threaded ends for compatibility with standard NPT male pipe
• Three-piece union design allows in-line disconnection without cutting pipe
• Compact size: 2 inches length, 1.5 inches width, 1.5 inches height

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/8 inch NPT threaded piping systems rated at Class 125 service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or local plumbing codes. Shut off the water or fluid supply and relieve system pressure before disassembling or installing any union fitting. Apply thread sealant or PTFE tape to the male NPT threads before making up the connection; do not overtighten, as brass fittings can crack under excessive torque. Inspect the union seat and nut for debris before assembly to ensure a leak-free seal.