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The VALUE COLLECTION B-PLG10 is a black square pipe plug used to seal threaded pipe openings in plumbing, gas, and industrial piping systems. Sized at 1 inch with a standard threaded end connection, it is manufactured from malleable iron with a black finish and rated Class 150. With a liquid and gas pressure rating of 300 psi, this plug is suited for moderate-pressure service on both liquid and gas lines. Licensed plumbers, pipefitters, and HVAC technicians install this type of plug during system commissioning, testing, or when capping unused branch outlets.
This square plug is appropriate for residential and light commercial piping applications where a durable, corrosion-resistant iron plug is required to close a 1-inch threaded port. Its square head drive profile allows installation and removal with standard pipe wrenches or adjustable wrenches without the need for specialty tooling. Common uses include capping gas supply branches, sealing test ports, and closing unused tee or cross outlets in black iron gas distribution piping.
Designed as an OEM-style replacement or new-installation fitting for 1-inch threaded black iron pipe systems rated at Class 150 or lower.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) where required. Shut off and depressurize the pipe system before removing or installing any fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not overtighten, as malleable iron threads can crack under excessive force.
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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