Merit Brass XNL187-40 Brass Pipe Union 2.5 in 125 Lb Fnpt

Product Description

The MERIT BRASS XNL187-40 is a 2.5-inch nominal brass pipe union with female NPT (FNPT) ends, rated at 125 lb. Pipe unions allow sections of threaded pipe to be connected and disconnected without rotating the pipe itself, making them a standard fitting in plumbing, HVAC, and light industrial systems. The brass construction provides solid corrosion resistance in water and low-pressure gas service. The rough finish indicates unpolished, as-cast brass suited for concealed installations. This fitting is installed by licensed plumbers and pipefitters working on threaded pipe systems.

This union is sized for 2.5-inch nominal pipe and is well suited for residential and commercial plumbing systems, hydronic heating loops, compressed air lines, and similar threaded-pipe applications where periodic disassembly of a pipe run is required. The FNPT connection on both ends accepts standard NPT-threaded pipe and fittings throughout North America. Imported fittings of this type are commonly used in non-critical service lines where a cost-effective threaded solution is appropriate.

Key Features

• 2.5-inch nominal size suits larger-diameter threaded pipe runs
• 125 lb pressure rating for standard service applications
• FNPT ends thread directly onto standard NPT male pipe ends
• Brass construction resists corrosion in water and low-pressure gas service
• Rough finish is suitable for concealed or utility installations
• Union design allows pipe disconnection without rotating the full pipe run

Compatibility

Designed as an OEM-style replacement or new-install threaded union for 2.5-inch nominal NPT pipe systems rated to 125 lb service class.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter. Shut off and depressurize the line fully before removing or installing any threaded union. Apply an appropriate thread sealant or PTFE tape to all male NPT threads before assembly. Follow applicable local plumbing codes and ASME B16.39 standards for malleable iron and brass union fittings in your jurisdiction.

Technical Specifications

• Nominal Size: 2.5 inches
• End Style: FNPT (Female National Pipe Thread)
• Pressure Rating: 125 lb
• Material: Brass
• Finish: Rough
• Origin: Import

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: XNL187-40