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The MIDLAND INDUSTRIES 64659 is a cored square head plug designed for use in threaded pipe systems requiring a sealed male connection. Built from malleable iron with a galvanized finish, this plug connects via a 2-1/2-inch male pipe thread (MPT) and is rated for pressures up to 150 psi. It meets ANSI B16.3 dimensional standards, making it a reliable choice for standard 150-pound malleable iron fitting applications. The galvanized coating provides corrosion resistance suited for a range of piping environments. Plumbers and pipefitters install this fitting in commercial and industrial systems where a cored plug is needed to temporarily or permanently close off a threaded pipe end.
This plug is used in galvanized malleable iron pipe assemblies operating within a temperature range of -20 to 350 degrees F. It is appropriate for residential and commercial plumbing, gas distribution, and mechanical piping systems where 150-pound pressure-class fittings are specified. The square head profile allows for easy installation and removal with a wrench, making it a practical choice in systems that may require future access at a closed connection point.
Designed as an OEM-style replacement and standard fitting for use in 150-pound galvanized malleable iron threaded pipe systems conforming to ANSI B16.3.
Installation is typically performed by a licensed plumber or pipefitter. Shut off all system pressure and drain the line before installing or removing any threaded fitting. Apply appropriate thread sealant or PTFE tape to the male threads before installation. Follow applicable codes including the IPC and IFGC when used in plumbing or gas piping applications.
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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