4 inch Brass Raised Square Head Plug

4 inch Brass Raised Square Head Plug – Heavy-Duty Threaded Seal for Drain and Cleanout Applications

The 4 inch Brass Raised Square Head Plug is designed to provide a secure mechanical seal in threaded pipe ends and cleanout access points. Manufactured from solid brass, this plug offers corrosion resistance, high-pressure tolerance, and durability for both residential and commercial applications.

Its raised square head allows for easy wrench engagement during installation and removal, especially in confined spaces or recessed cleanouts. The plug is suitable for use in systems requiring periodic access or sealing of unused threaded openings in drainage, waste, or vent piping.

Field-Proven Advantages

• ✅ Machined Brass Body – Offers high corrosion resistance and long-term mechanical integrity in plumbing systems.
• ✅ Raised Square Head Design – Provides reliable tool engagement for high-torque installation or extraction.
• ✅ Threaded NPT Connection – Ensures compatibility with standard female threaded cleanouts or pipe ends.
• ✅ Pressure-Sealing Capability – Suitable for systems requiring a tight hydraulic or gas seal.
• ✅ Maintenance-Friendly Component – Easily removable for service access or inspection procedures.

Specifications

• Material: Solid Brass
• Head Style: Raised Square
• Connection Type: Male NPT Thread
• Nominal Size: 4 inches
• Application: Drainage, Waste, Vent, and Cleanout Termination
• Standards: Complies with applicable ANSI and ASME dimensional standards

Installation Considerations

Install into a properly threaded female NPT fitting using pipe dope or thread sealant tape to ensure leak-free sealing. Tighten using a square-head socket or adjustable wrench. Avoid overtightening to prevent thread distortion or fitting damage, particularly in cast or PVC cleanout bodies.

Common Use Cases

Typically used in DWV systems, mechanical rooms, and cleanout assemblies. Suitable for new construction or maintenance retrofits requiring access closure at code-mandated locations or inspection points.

Technical Insight

Brass plugs provide superior resistance to dezincification and are preferred in areas with variable water chemistry. Their mechanical reliability makes them suitable for high-use or critical access points subject to cyclical removal and reinstallation.

The 4 inch Brass Raised Square Head Plug supports long-term performance in threaded pipe sealing, offering a contractor-grade solution for cleanouts, drain terminations, and capped lines across a range of plumbing system designs.