Merit Brass XB187-24 Brass Pipe Union 1-1/2 in Class 125

Product Description

The MERIT BRASS XB187-24 is a Class 125 brass pipe union designed for 1-1/2 inch pipe connections with female British Standard Pipe Taper (FBSPT) ends on both sides. Unions allow technicians to disconnect and reconnect piping sections without rotating the pipe itself, making them a standard fitting in plumbing, HVAC hydronic systems, and light industrial supply lines. The all-brass construction provides corrosion resistance in water and air service applications. At 2.09 pounds, the fitting is sized for moderate-duty service within the Class 125 pressure rating. Licensed plumbers and pipefitters are the primary installers of this type of fitting.

This union fits into residential and light commercial plumbing and mechanical systems wherever a serviceable disconnect is needed in a 1-1/2 inch threaded pipe run. Common applications include boiler supply and return connections, water heater piping, pump isolation points, and general plumbing distribution lines. The FBSPT x FBSPT thread configuration suits standard tapered female-threaded ports found throughout these systems.

Key Features

• 1-1/2 inch fitting size accommodates common residential and light commercial pipe runs
• FBSPT x FBSPT end connections on both sides for all-female threaded installation
• Class 125 pressure rating suitable for water and low-pressure air service
• Brass construction offers corrosion resistance in wet and humid environments
• Union design allows pipe disconnection without rotating the adjacent pipe sections

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/2 inch threaded pipe systems using FBSPT connections rated at Class 125 service.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing code requirements. Shut off and depressurize the system completely before removing the existing union or installing this fitting. Apply appropriate thread sealant or PTFE tape to all male threads before assembly. Do not over-tighten the union nut, as this can distort the seating surfaces and cause leaks.