Value Collection 13371 3/8 in Square Plug Malleable Iron

Product Description

The VALUE COLLECTION 13371 is a 3/8-inch malleable iron square plug designed to seal threaded pipe openings in low- to medium-pressure piping systems. Finished in black, this Class 150 fitting carries a liquid and gas pressure rating of 300 psi, making it suitable for use in a wide range of piping applications involving air, water, gas, or steam within its rated limits. Licensed plumbers, pipefitters, and HVAC technicians install this type of plug when capping unused tapped ports on valves, manifolds, fittings, and pipe assemblies. The malleable iron construction provides reliable durability in standard commercial and industrial piping environments.

The 13371 square plug is used in residential and commercial piping installations wherever a threaded end connection must be sealed off. Typical applications include capping spare ports on gas manifolds, water distribution headers, hydronic heating systems, and compressed air lines. The square head profile allows standard wrench engagement for proper torque without the need for specialty tools. This fitting ships in a quantity of 5 per package, which suits service techs and contractors who frequently stock common plug sizes on their trucks or in parts inventory.

Key Features

• Malleable iron construction with black finish for corrosion resistance in standard piping environments
• Class 150 rated with 300 psi liquid and gas pressure capacity
• 3/8-inch threaded end connection for direct engagement with standard NPT female ports
• Square head profile accepts standard wrenches for installation and removal
• Packaged in quantities of 5, suited for service stock and small-job replenishment

Compatibility

Designed as a standard Class 150 malleable iron threaded square plug compatible with 3/8-inch NPT female threaded pipe ports in typical plumbing, HVAC, and gas piping installations.

Installation Notes

Installation of threaded pipe plugs should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, IPC, and IFGC requirements. Always depressurize and isolate the affected piping section before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not exceed the 300 psi pressure rating for the connected service.