Description
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.
| Specification | Detail |
|---|---|
| MPN | 31-1/4B |
| Brand | PROSOURCE / Worldwide Sourcing |
| Size | 1/4 inch |
| Material | Malleable Iron |
| Finish / Color | Black |
| Head Style | Square Head |
| Connection Type | Screwed (Threaded) |
| Max Working Pressure | 150 PSI (Steam and Water) |
| Weight | 3.91 lb |
| Category | Hardware > Plumbing > Plumbing Fittings & Supports |
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.
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