Merit Brass XB187-04 Brass Pipe Union 1/4 in Threaded Class 125

Product Description

The MERIT BRASS XB187-04 is a 1/4 inch brass pipe union designed for threaded plumbing and piping connections. It features female British Standard Pipe Taper (FBSPT) ends on both sides, allowing a threaded union joint to be made and broken without disturbing adjacent piping. Rated at Class 125, this union suits low-to-moderate pressure service in water, gas, and general fluid systems. At 0.22 pounds, it is a compact fitting used in tight spaces where a removable union joint is required. Licensed plumbers and pipefitters install this fitting in residential and light commercial systems.

This union is suited for 1/4 inch threaded pipe runs in residential plumbing, HVAC-related piping, gas service lines, and general industrial fluid distribution where a serviceable union connection is needed. The FBSPT x FBSPT configuration is standard in applications requiring a removable joint for equipment isolation, maintenance access, or future system modifications. Class 125 pressure rating aligns with typical domestic water and low-pressure gas service requirements.

Key Features

• 1/4 inch fitting size for small-diameter threaded pipe runs
• FBSPT x FBSPT end connections for standard threaded engagement on both sides
• Class 125 pressure rating suitable for water, gas, and general fluid service
• Brass construction provides corrosion resistance and durability in wet or humid environments
• Union design allows joint disassembly without cutting or disturbing adjacent pipe

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4 inch threaded pipe systems using FBSPT end connections rated to Class 125 service.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable IPC and IFGC code requirements for the service type. Shut off and depressurize the line before disassembling or installing any union fitting. Apply thread sealant or PTFE tape appropriate for the fluid service to all threaded connections before assembly. Do not over-tighten brass fittings; use hand-tight plus wrench turns per standard practice to avoid thread damage.