3/4 inch x 4-1/2 inch Brass Nipple

3/4" x 4-1/2" Red Brass Pipe Nipple – Machined for High-Integrity Connections

The 3/4" x 4-1/2" red brass nipple is a precision-machined component suitable for pressure-rated plumbing, mechanical, and water distribution systems. Manufactured from lead-free C46400 or C23000 brass alloys, this fitting delivers excellent corrosion resistance, high tensile strength, and reliable performance in potable and non-potable water applications.

Performance Highlights

• ✅ Machined NPT Threads – Conforms to ANSI B1.20.1 standards for compatibility with standard threaded fittings.
• ✅ Lead-Free Alloy – Complies with federal Safe Drinking Water Act requirements for use in systems delivering potable water.
• ✅ Temperature and Pressure Resistant – Suitable for use in environments up to 400°F and rated for standard working pressures in typical plumbing systems.
• ✅ Superior Machinability – Red brass allows for tight tolerances and consistent installation performance.

Technical Specifications

• Nominal Pipe Size: 3/4 inch
• Length: 4-1/2 inches
• Material: Red brass (C23000 or C46400)
• Thread Type: Male NPT, both ends
• Standard Compliance: ASTM B43, ANSI B1.20.1, NSF/ANSI 61-G and NSF/ANSI 372

Installation Considerations

Use of appropriate thread sealant (PTFE tape or anaerobic pipe compound) is recommended to ensure watertight joints. Red brass offers improved dezincification resistance over yellow brass and provides added longevity in aggressive water conditions. Thread engagement should not exceed hand-tight plus 1–2 turns with a wrench to avoid thread galling or damage.

Common Applications

This fitting is commonly specified in commercial and residential water distribution systems, boiler loop assemblies, low-pressure steam, and hydronic heating systems. It is also frequently used in compressed air lines and other mechanical piping where reliability and material integrity are essential.

Code Compliance Insight

All red brass pipe nipples used in potable systems must be certified lead-free per federal and state legislation. This nipple meets or exceeds current code requirements in all 50 states for use in systems delivering drinking water.

The 3/4" x 4-1/2" red brass nipple is an engineered solution for professionals requiring a durable, code-compliant component with excellent corrosion resistance and precise threading. Ideal for high-performance systems where reliability and longevity are non-negotiable.