3/8 inch Brass Cap

3/8" Lead-Free Brass Cap – For Compliant System Terminations

The 3/8" Lead-Free Brass Cap is engineered for sealing the ends of threaded pipe runs in potable water and mechanical systems. Manufactured from dezincification-resistant (DZR) brass, this fitting is suitable for use in environments where lead-free compliance and mechanical durability are required.

Its NPT threading provides a secure, leak-resistant seal when properly installed with thread compound or PTFE tape. The cap is machined to tight tolerances to ensure compatibility with Schedule 40 or Schedule 80 threaded pipe and fittings commonly used in residential, commercial, and institutional installations.

Functional and Regulatory Performance

• ✅ Threaded NPT Design – Ensures a secure seal under static and dynamic pressure conditions.
• ✅ Lead-Free Composition – Manufactured from certified no-lead brass (<0.25% weighted average) in compliance with NSF/ANSI 61 and 372 standards.
• ✅ Application Range – Suitable for termination points in hot and cold potable water systems, hydronic loops, and air testing setups.

Technical Characteristics

• Material: Lead-free brass (DZR alloy)
• Nominal Size: 3/8" (National Pipe Thread – Female)
• Temperature Rating: Up to 200°F depending on system design and sealant used
• Pressure Rating: Suitable for standard water system pressures (up to 125 psi typical)
• Certifications: Complies with NSF 61/372, ANSI B1.20.1 (NPT Threads)

Installation Considerations

Cap installation requires standard threading tools and proper sealing materials. For pressurized systems, ensure torque values do not exceed recommended limits to avoid deformation or thread damage. Use in systems subject to inspection requires verification of compliance with local codes, particularly lead-content restrictions for potable water applications.

Typical Use Cases

Commonly used to terminate branches during rough-in, isolate test ports, or seal unused outlets in manifolds or mechanical equipment. Can be applied in both temporary and permanent configurations, depending on system requirements and inspection protocols.

Code Compliance Note

As of 2014, federal and state plumbing codes require the use of lead-free components (<0.25% lead by weighted average) in all potable water systems across the United States. This cap meets or exceeds all applicable requirements.

For mechanical system integrity and regulatory compliance, the 3/8" Lead-Free Brass Cap provides a reliable sealing solution in professional-grade piping assemblies.