1-1/2 inch Brass Cored Square Head Plug

1-1/2 inch Brass Cored Square Head Plug – Lead-Free, Threaded System Termination

The 1-1/2 inch brass cored square head plug is designed to seal female-threaded openings in fluid and mechanical systems. Constructed from lead-free brass, this plug provides a durable and corrosion-resistant closure for service points, test ports, and unused branches in piping networks.

Application-Driven Performance

This plug is commonly used in pressure-rated systems requiring reliable termination of threaded outlets. Engineered for compatibility with standard pipe threads, it supports secure sealing and long service life under varying conditions:

• ✅ Male NPT Threaded Connection Tapered threads conform to ASME B1.20.1 for leak-resistant engagement with compatible fittings and pipe.
• ✅ Square Head Design Enables torque application using open-end or adjustable wrenches for easy installation and removal, even in recessed configurations.
• ✅ Lead-Free Brass Manufactured to meet NSF/ANSI 61 and 372 requirements for potable water system components.
• ✅ Pressure- and Temperature-Rated Suitable for use in hot and cold water, low-pressure steam, and general fluid handling systems.

Specifications

• Material: Lead-free brass
• Nominal Size: 1-1/2 inch
• Connection: Male NPT (tapered pipe thread)
• Head Type: Solid square
• Compliance: Certified to NSF 61 and NSF 372 for potable water

Installation Notes

Install using PTFE tape or approved pipe joint compound to ensure leak resistance and prevent galling. Apply torque with a compatible wrench on the square head—avoid overtightening, which may distort threads or damage mating components. Verify compatibility with system pressure, temperature, and media prior to installation.

Common Use Cases

This plug is used in residential, commercial, and industrial plumbing systems to cap or isolate unused branches in water supply lines, heating circuits, drainage terminations, and other threaded assemblies. It is also commonly applied in test ports and temporary system closures pending future expansion.

Code and Material Insight

Federal regulations now require all components in potable water systems to be certified lead-free. This brass plug meets those standards, offering long-term reliability in regulated installations without compromising system integrity.

The 1-1/2 inch brass cored square head plug offers a dependable, compliant solution for sealing threaded outlets in plumbing and mechanical systems. Built for durability and ease of installation, it provides the secure closure contractors expect on high-integrity systems.