1/2 inch Galvanized Iron Cap

1/2" Galvanized Iron Cap – Threaded Termination for Closed-End Piping

The 1/2" Galvanized Iron Cap is designed for the permanent or temporary termination of male-threaded iron piping in pressurized or non-pressurized systems. Its corrosion-resistant zinc coating and cast-iron body ensure structural reliability in demanding applications such as potable water lines, air compression systems, and low-pressure gas distribution.

This fitting provides a secure mechanical seal at the end of piping runs, preventing fluid or gas discharge and protecting system components from debris or environmental exposure. Manufactured to meet standard ANSI/ASME B16.3 dimensional requirements, it is compatible with Schedule 40 galvanized or black pipe in corresponding nominal sizes.

Product Features and Performance Characteristics

• ✅ Material Composition: Hot-dipped galvanized malleable iron for enhanced corrosion resistance.
• ✅ Thread Standard: Tapered NPT threading ensures tight, interference-fit sealing with male-threaded steel pipe.
• ✅ System Closure: Effective for pipe-end sealing in plumbing, mechanical, and utility piping applications.
• ✅ Mechanical Integrity: Cast and finished to reduce stress cracking and resist deformation during torquing.
• ✅ Service Versatility: Suitable for indoor and outdoor use in both commercial and light industrial environments.

Technical Specifications

• Nominal Size: 1/2 inch
• Material: Galvanized malleable iron
• Thread Type: Female NPT
• Design Standard: Conforms to ANSI/ASME B16.3 and ASTM A197

Installation Considerations

This component is intended for use with threaded galvanized or black steel piping. Installation requires the application of an appropriate thread sealant or PTFE tape to ensure leak resistance. Use standard pipe wrenches for tightening. Avoid over-torquing to maintain thread integrity and prevent fitting distortion.

Common Applications

Frequently used in potable and non-potable water systems, compressed air lines, and piping systems requiring sealed terminations during system isolation, pressure testing, or expansion staging. The 1/2" cap is suitable for both permanent and temporary service closures.

Engineering Insight

Galvanized iron fittings provide extended service life in systems exposed to moisture or corrosive environments. The zinc coating acts as a barrier against oxidation, making these fittings a preferred option for utility-grade and infrastructure installations.