1/4 inch Brass Cap

1/4" Lead-Free Brass Cap – Threaded End Seal for Potable and Utility Systems

The 1/4 inch Lead-Free Brass Cap is a female-threaded fitting used to terminate male-threaded pipe or tubing ends in fluid handling systems. Manufactured from lead-free brass, this cap is compliant with potable water requirements and is suitable for use in both residential and commercial applications involving water, air, oil, or inert gases.

Designed to provide a secure mechanical seal, this cap is often installed at the termination of service lines, appliance connections, or test points to isolate sections of piping or prepare systems for future expansion. Its corrosion-resistant construction ensures long-term performance in both indoor and outdoor environments.

Product Features

• ✅ Lead-Free Brass Composition: Certified to meet requirements for potable water system use under NSF/ANSI 61 and 372.
• ✅ Threaded End Connection: Female NPT threads conform to ANSI/ASME B1.20.1 standards for tight, leak-resistant engagement.
• ✅ Corrosion Resistance: Suitable for exposure to potable water, compressed air, and non-corrosive liquids or gases.
• ✅ Mechanical Seal: Designed for low- to moderate-pressure applications requiring manual access or system closure.

Technical Specifications

• Nominal Size: 1/4 inch
• Material: Lead-free brass (compliant with Reduction of Lead in Drinking Water Act)
• Connection Type: Female NPT
• Usage: Potable water lines, instrumentation stubs, shut-off valve terminations, test ports
• Standards: NSF/ANSI 61 & 372, ANSI/ASME B1.20.1

Installation Guidelines

Apply thread sealant or PTFE tape rated for system media prior to installation. Use hand tightening followed by wrench engagement to the recommended torque. Avoid overtightening to prevent thread damage. This cap is not designed for use in systems requiring welded or soldered closures.

Common Applications

This cap is typically used in plumbing systems to seal off open male-threaded pipe ends, including unused service ports, fixture risers, irrigation stubs, and backflow preventer test points. It is suitable for use in low-pressure fluid systems requiring periodic serviceability or system isolation.

Code Compliance Note

Lead-free brass fittings are required in potable water applications under U.S. federal regulations. This fitting complies with national plumbing codes and is approved for installation in systems intended for human water consumption.

The 1/4" Lead-Free Brass Cap offers a secure and corrosion-resistant method for sealing threaded terminations in potable and general-purpose piping systems. Engineered to meet dimensional and safety standards, it provides a dependable solution for contractors seeking code-compliant, long-lasting components.