1-1/2 inch x 4 inch Brass Nipple

1-1/2" x 4" Brass Pipe Nipple – Built for Demanding Systems

The 1-1/2" x 4" Brass Pipe Nipple is engineered for high-integrity performance in pressure and fluid handling systems. Manufactured from corrosion-resistant, lead-free brass, this fitting provides a dependable threaded connection in potable water, oil, air, or gas applications. Its robust structure and precision threading make it a standard for contractors working with commercial and industrial-grade systems.

Performance Features

• ✅ Lead-Free Brass – Conforms to low-lead requirements (<0.25% lead), making it suitable for potable water systems per Safe Drinking Water Act (SDWA) standards.
• ✅ Full-Length Threading – Male NPT threads deliver strong mechanical engagement and consistent sealing when paired with approved thread sealant or PTFE tape.
• ✅ Corrosion Resistance – Naturally resistant to dezincification and chloride-induced stress cracking, even in aggressive water conditions.
• ✅ High Working Pressure – Suitable for both low- and medium-pressure systems depending on pipe schedule and application, typically exceeding 1200 PSI at ambient temperatures.
• ✅ Versatility – Compatible with brass, bronze, copper, steel, and iron piping components in mixed-metal systems.

Specifications

• Material: C46400 or C69300 lead-free brass (ASTM B687/B16.15)
• Size: 1-1/2" NPT male x 4" length
• Connection: Threaded both ends (MNPT x MNPT)
• Temperature Range: Up to 400°F depending on system pressure
• Compliance: Meets NSF 61 and 372 certifications for potable water

Applications

Commonly used in water distribution systems, pressure lines, HVAC units, and compressed air systems. The brass nipple is often deployed where galvanic compatibility and long-term corrosion resistance are critical.

Best Practices

For optimal installation, always verify thread engagement with compatible components and avoid over-torqueing. Use only appropriate thread sealants compatible with brass and the intended media.

Professionals rely on brass nipples for their consistent machinability, strength, and chemical resistance. This 1-1/2" x 4" model is ready to support code-compliant plumbing and mechanical applications where performance cannot be compromised.