3/8 inch x 4 inch Chrome-Plated Brass Nipple

3/8" x 4" Brass Pipe Nipple – Lead-Free, Threaded Fitting for Potable and Mechanical Systems

The 3/8" x 4" brass pipe nipple is a straight, male-threaded fitting used to extend piping runs or facilitate connections in threaded piping systems. Constructed from lead-free brass, this fitting is designed for potable water systems, low-pressure gas lines, and mechanical piping applications requiring corrosion resistance and dimensional stability.

Both ends feature National Pipe Taper (NPT) male threads machined to ANSI B1.20.1 specifications, ensuring compatibility with other threaded fittings, valves, and equipment. The fitting is suitable for residential, commercial, and industrial use in systems conforming to current plumbing codes.

Product Specifications

• Material: Lead-free brass (typically C46500 or equivalent)
• Nominal Size: 3/8 inch
• Length: 4 inches (overall including threads)
• Thread Type: NPT (Male x Male), ANSI B1.20.1
• Compliance: NSF/ANSI 61 & 372, Safe Drinking Water Act (SDWA) compliant

Application Areas

• Potable water supply lines (hot and cold)
• Low-pressure air and gas systems (verify material compatibility)
• Hydronic heating loops and recirculation lines
• Connection between valves, risers, and threaded fixtures

Installation Guidelines

Threaded brass nipples must be installed using PTFE tape or approved thread sealant to ensure leak-free operation. Avoid over-torquing, especially in systems using brass or copper female fittings. Ensure proper thread engagement and alignment to prevent cross-threading and to maintain seal integrity under pressure.

Code Considerations

This fitting meets federal and state requirements for use in lead-free potable water systems. It is approved for aboveground installation and may be used in systems governed by IPC, UPC, and local code authorities, provided material compatibility and pressure limits are met.

Summary

The 3/8" x 4" brass nipple is a durable, corrosion-resistant fitting for joining or extending threaded piping in code-compliant plumbing systems. Its lead-free composition and precision threading make it a dependable choice for applications requiring consistent performance and safe material certification.