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The MIDLAND INDUSTRIES 44650 is a cored square head plug designed for threaded pipe systems requiring a reliable, pressure-rated closure. Constructed from bronze, this fitting features a 1/8 inch male pipe thread (MPT) connection and carries a 125 pressure class rating. The square head drive allows for wrench installation without a specialty tool. At 0.51 inches in length and 0.020 pounds, it is a compact, lightweight component suited for tight-clearance applications. It is dimensioned to ANSI B16.15 standards, confirming consistent thread and body geometry for interchangeable fitment across compatible bronze fitting assemblies. Licensed plumbers and pipefitters are the typical installers of this fitting in commercial and residential pipe systems.
This plug is rated for use with air, gas, oil, steam, and water service, making it appropriate across a wide range of plumbing, HVAC, and light industrial piping applications. Typical uses include capping unused branch outlets on bronze threaded manifolds, isolation valves, and distribution headers. The 125 pressure class designation aligns with standard low-pressure service requirements common in residential and light commercial systems. Its bronze construction resists corrosion in both wet and dry service environments, supporting long service life in potable water and hydronic heating systems alike.
Designed as an OEM-style replacement or new-installation bronze threaded fitting for 1/8 inch MPT ports rated for 125-class air, gas, oil, steam, and water service per ANSI B16.15.
Installation is performed by a licensed plumber or pipefitter following applicable IPC or IFGC code requirements for the service medium. Shut off and depressurize the system completely before removing or installing any threaded plug. Apply a code-approved thread sealant or PTFE tape to the male threads before installation. Do not over-tighten; use a wrench on the square head and stop when the fitting is snug and properly seated to avoid cracking the bronze body or damaging the female fitting port.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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