2 inch Square Head Galvanized Cast Iron Plug

2" Galvanized Cast Iron Plug – Threaded Pipe Closure for Drainage and Vent Systems

The 2" Galvanized Cast Iron Plug is a solid pipe fitting designed to close the end of a female-threaded opening in iron or steel piping systems. Commonly used in drain, waste, and vent (DWV) applications, this plug provides a secure mechanical seal in non-pressurized piping assemblies where future disassembly or system expansion may be required.

Fabricated from malleable cast iron with a corrosion-resistant zinc coating, the plug resists oxidation and mechanical wear in exposed or damp environments. Its square head allows for installation and removal using standard hand tools, making it a practical component in both new construction and maintenance work.

Product Specifications

• Nominal Size: 2 inch
• Material: Galvanized malleable cast iron (ASTM A197)
• Thread Type: Male NPT (National Pipe Thread per ANSI/ASME B1.20.1)
• Design: Solid plug body with square head for wrench installation
• Finish: Hot-dip galvanized coating for enhanced corrosion resistance (ASTM A153)

Standards and Compliance

• Manufactured in accordance with ASME B16.3 (Malleable Iron Threaded Fittings)
• Threaded to ANSI B1.20.1 specifications
• Galvanizing meets ASTM A153 specifications for iron and steel hardware

Installation Guidelines

Apply PTFE tape or a compatible pipe joint compound to the threads prior to installation to ensure a tight seal. Tighten using an adjustable wrench or square socket to the appropriate torque specified for the system material. Avoid over-tightening, which may crack mating fittings or distort threads.

Typical Applications

• DWV systems in commercial and residential buildings
• Temporary or permanent closure of cleanout tees or access points
• Vent termination points during system pressure testing
• Service access ports in mechanical rooms or pipe chases

Material Considerations

Galvanized cast iron offers a combination of high compressive strength and corrosion resistance, making it suitable for environments where moisture exposure is expected. This fitting is not intended for pressurized potable water systems without additional corrosion control measures.

The 2" Galvanized Cast Iron Plug provides a durable, code-compliant solution for sealing threaded terminations in DWV piping assemblies. Engineered for performance in gravity-fed drainage and venting systems where secure closure and future accessibility are required.