Merit Brass XNL117-20 Cored Square Head Plug 1-1/4 in Mnpt

Product Description

The MERIT BRASS XNL117-20 is a cored square head plug designed for use in low-pressure piping systems where a threaded closure is required. The plug features a male NPT (MNPT) end style and a 1-1/4 inch nominal size, making it a standard-dimension fitting for threaded pipe assemblies. Rated at 125 lb, this brass plug is supplied with a rough finish and is an import product. Plumbers and pipefitters install this type of fitting to cap or plug threaded ports in pipe networks, manifolds, and valve bodies.

This fitting is suited for residential and light commercial plumbing, hydronic heating systems, and general-purpose piping applications where a brass, threaded square head plug is specified. The square head profile allows for easy wrench engagement during installation and removal. At 1-1/4 inch MNPT, it fits standard Schedule 40 threaded pipe fittings and valve bodies of the same nominal size. The 125 lb pressure class is appropriate for low-pressure water and air service typical in these applications.

Key Features

• 1-1/4 inch nominal MNPT thread for compatibility with standard threaded pipe systems
• 125 lb pressure class rating suitable for low-pressure water and air service
• Brass construction provides corrosion resistance in water and air piping
• Cored square head design allows positive wrench grip for installation and removal
• Rough finish suitable for use as-is or with thread sealant tape or compound

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch MNPT threaded pipe systems rated at 125 lb class pressure service.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC or local plumbing code requirements. Shut off system pressure and drain the line before installing or removing any threaded plug. Apply an appropriate thread sealant compound or PTFE tape to the male threads before engagement to ensure a leak-free seal. Use a proper box or open-end wrench on the square head — do not use pipe wrenches on the head itself, as this can damage the fitting.

Technical Specifications

• Nominal Size: 1-1/4 inches
• End Style: MNPT (Male National Pipe Thread)
• Pressure Rating: 125 lb
• Material: Brass
• Finish: Rough
• Head Style: Cored Square Head
• Origin: Import

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: XNL117-20