Merit Brass XB111-04 Brass Coupling 1/4 in Fbspt Class 125

Product Description

The MERIT BRASS XB111-04 is a Class 125 brass pipe coupling designed for threaded pipe connections in plumbing, HVAC, and general fluid-handling systems. It features female British Standard Pipe Taper (FBSPT) threads on both ends, allowing two male-threaded pipe sections to be joined inline. The coupling is machined from brass, which resists corrosion and holds up well in water, air, and low-pressure gas service. At a package weight of approximately 0.10 pounds, this is a compact, single-unit fitting suited for 1/4 inch pipe sizes. Licensed plumbers and pipefitters are the primary installers, though HVAC technicians routinely use fittings of this type for refrigerant-adjacent and condensate piping work.

This coupling is appropriate for residential and light commercial piping applications where Class 125 pressure ratings are acceptable. It is used in water supply lines, compressed air distribution, and low-pressure gas or fuel-line assemblies where threaded brass fittings are specified. The 1/4 inch size is common in instrument tubing, pilot lines, and small-diameter service connections. Both FBSPT end connections accept standard male-threaded pipe, making it straightforward to install inline without modification.

Key Features

• FBSPT x FBSPT threaded end connections join two male-threaded pipe sections
• Class 125 pressure rating suitable for water, air, and low-pressure gas service
• 1/4 inch fitting size fits standard 1/4 inch male-threaded pipe
• Brass construction provides corrosion resistance in wet and humid environments
• Compact, lightweight design at approximately 0.10 pounds

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4 inch threaded pipe systems requiring Class 125-rated brass couplings with FBSPT connections on both ends.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter. Shut off and depressurize the supply line before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male pipe threads before making up the connection. Torque to hand-tight plus a standard number of turns per applicable plumbing code; consult IPC or local code requirements for the specific fluid service.