Merit Brass XB111-20 Brass Pipe Coupling 1-1/4 in Class 125

Product Description

The MERIT BRASS XB111-20 is a Class 125 brass pipe coupling designed for joining threaded pipe sections in plumbing and piping systems. It features female British Standard Pipe Taper (FBSPT) connections on both ends, allowing a straight inline connection between two threaded pipe runs. At 1-1/4 inches fitting size, this coupling suits moderate-flow residential and light commercial plumbing, hydronic, and general-purpose piping applications. Weighing 0.56 pounds, the all-brass construction offers corrosion resistance and reliable sealing under Class 125 pressure ratings. Licensed plumbers and pipefitters are the typical installers for this type of fitting.

This coupling is suited for use in residential and light commercial piping systems where a straight threaded union of two pipe ends is required. Common install scenarios include water supply lines, low-pressure steam or hydronic heating distribution, and general industrial fluid handling where Class 125 brass fittings are specified. The FBSPT x FBSPT end configuration accommodates standard tapered threaded pipe on both sides of the joint.

Key Features

• FBSPT x FBSPT end connections for straight inline pipe joining
• Class 125 pressure rating suitable for water, steam, and fluid service
• 1-1/4 inch fitting size for moderate-flow piping runs
• Brass construction provides corrosion resistance in wet service environments
• Compact, single-piece coupling design with no moving parts

Compatibility

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

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IPC guidelines. Shut off and depressurize the pipe system fully before removing or installing any threaded fitting. Apply an appropriate pipe thread sealant or PTFE tape to the male threaded pipe ends before making up the joint. Do not overtighten, as brass fittings can crack under excessive torque.