Midland Industries 44641LF 4 in Mpt Bronze Countersunk Plug

Product Description

The MIDLAND INDUSTRIES 44641LF is a square drive countersunk plug designed for sealing threaded pipe openings in pressurized plumbing and water distribution systems. Manufactured from lead-free bronze, this plug meets current lead-free compliance requirements for potable water applications. It features a 4-inch male pipe thread (MPT) connection with a 4-8 thread specification and is rated for a 125 lb pressure class. The 2.12-inch socket size accommodates a standard square drive tool for installation and removal. At 3.210 pounds, it is a heavy-duty fitting suited for demanding service conditions. Licensed plumbers and pipefitters working on commercial or municipal water systems are the primary installers of this component.

This countersunk plug is intended for use in residential, commercial, and municipal plumbing systems where a flush or recessed seal is required on a 4-inch MPT threaded port. Its lead-free bronze construction makes it appropriate for potable water service lines and distribution systems subject to lead-free material mandates. The countersunk head profile allows the plug to seat below the surrounding surface, reducing obstruction in tight piping configurations. It is suited for above-ground and in-wall installations where code compliance and long-term corrosion resistance are required.

Key Features

• Lead-free bronze construction meets potable water lead-free compliance requirements
• 4-inch MPT connection with 4-8 thread for secure engagement in standard threaded fittings
• 125 lb pressure class rating for use in moderate-pressure systems
• 2.12-inch square drive socket for installation with standard drive tools
• Countersunk head profile allows flush or recessed seating in pipe assemblies
• Conforms to AWWA C800, ASME B16.15, ASME B1.20.1, WW-P-460C, and MSS-SP-106 standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 4-inch MPT threaded ports in lead-free bronze plumbing assemblies conforming to AWWA C800 and ASME B16.15 dimension standards.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASME or AWWA standards. Shut off and depressurize the system completely before removing or installing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads prior to installation. Use a square drive tool sized for the 2.12-inch socket and do not over-torque, as bronze fittings can be damaged by excessive force.