1/4 BLACK PLUG

Overview

The 1/4 Black Plug (31-1/4B) is designed for threaded pipe assemblies requiring a reliable seal on steam and water lines operating at working pressures up to 150 PSI.

Technical Features

• Malleable iron construction — provides the structural durability required to withstand pressure cycling in both steam and water service applications.
• 150 PSI maximum working pressure rating — meets the pressure demands of standard steam and water distribution systems without risk of fitting failure.
• Screwed (threaded) connection — enables secure, tool-assisted installation into existing 1/4-inch threaded pipe ends, minimizing the risk of leaks at termination points.
• Square head design — provides flat wrench-engagement surfaces for reliable torque application during installation or removal.
• Black finish — consistent with standard black iron pipe system aesthetics and compatible with typical black pipe fitting assemblies.
• 1/4-inch pipe size — sized for use on small-diameter branch lines or capped outlets within a larger piping network.

Applications

• Capping unused or temporary threaded pipe outlets on steam distribution systems rated to 150 PSI.
• Terminating open-ended water pipe lines in residential, commercial, or light industrial plumbing installations.
• Sealing 1/4-inch threaded ports on manifolds, valves, or pipe assemblies during system testing or permanent decommissioning of a branch line.
• Use in black iron pipe systems where fitting finish consistency is required.