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The ASC Engineered Solutions 319902722 is a 4-inch threaded galvanized steel square head plug designed to cap and seal threaded pipe ends in plumbing and mechanical piping systems. The square head profile allows for positive wrench engagement, making installation and removal straightforward with standard hand tools. Constructed from galvanized steel, this plug provides corrosion resistance suitable for a range of piping applications. At 3.80 pounds, it is a solid, heavy-duty fitting built for durable service. Licensed plumbers and pipefitters are the typical installers for this type of threaded plug.
This plug is commonly used in residential and commercial plumbing, HVAC hydronic piping, and general mechanical systems wherever a threaded pipe end requires a secure, removable closure. It is suited for use in drain, waste, and vent configurations as well as pressure piping runs that call for a threaded end cap. The 4-inch size addresses larger-diameter pipe terminations in main lines or branch runs where a reliable seal is required.
Designed as an OEM-style threaded pipe plug for use with 4-inch female NPT threaded pipe fittings in standard plumbing and mechanical piping systems.
Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing codes. Depressurize and drain the piping system before installing or removing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation to ensure a leak-free seal. Do not overtighten — use a pipe wrench with steady, controlled force to seat the plug without damaging threads.
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