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The VALUE COLLECTION 4SQ3/4 is a 3/4 inch square head pipe plug manufactured from 304 stainless steel. It is designed to seal off pipe ends and unused ports in threaded piping systems, providing a secure, pressure-rated closure in a wide range of fluid and gas service applications. The plug uses a male NPT (MNPT) threaded connection and carries a pressure rating of 150 psi. Plumbers, pipefitters, and mechanical contractors install this type of plug during system commissioning, maintenance, and when capping inactive branch lines. The square head drive allows for firm engagement with a wrench for reliable installation and removal.
This plug is suited for residential and commercial plumbing, process piping, HVAC hydronic systems, and general industrial piping where a durable, corrosion-resistant closure is required. The 304 stainless steel construction resists rust and chemical attack, making it appropriate for wet or mildly corrosive service environments. It installs into any standard 3/4 inch female NPT threaded fitting, valve body, or equipment port.
Designed as an OEM-style replacement or service fitting for any standard 3/4 inch female NPT threaded port in plumbing, HVAC, or industrial piping systems rated at 150 psi or below.
This plug is installed by licensed plumbers or pipefitters working on threaded piping systems. Shut off and depressurize the system before removing or installing any pipe plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation, following local plumbing code requirements such as those in the IPC or IFGC. Do not overtighten, as this can crack fittings or damage threads in softer base materials.
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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