1/2 inch x 4 inch Brass Nipple

1/2" x 4" Brass Pipe Nipple – Lead-Free, Threaded Fitting for Potable and Mechanical Systems

The 1/2" x 4" brass nipple is a precision-machined, lead-free pipe fitting used to extend piping runs and facilitate transitions within threaded plumbing systems. Manufactured to industry-standard tolerances, this fitting is designed for use in potable water supply, hydronic heating, and general mechanical applications requiring corrosion-resistant threaded connections.

It features male National Pipe Tapered (NPT) threads on both ends for compatibility with standard brass, copper, or galvanized fittings. The durable brass construction provides resistance to dezincification, making it suitable for long-term exposure in various residential and commercial systems.

Fitting Characteristics

• ✅ Material: Lead-free brass, compliant with NSF/ANSI 61 and 372 for potable water applications
• ✅ Dimensions: Nominal pipe size: 1/2", Length: 4"
• ✅ Threading: ANSI B1.20.1 NPT male threads on both ends
• ✅ Corrosion Resistance: Suitable for use in systems conveying hot or cold domestic water
• ✅ Temperature & Pressure: Capable of withstanding typical working conditions in water and hydronic systems

Installation Information

This nipple should be installed using appropriate pipe joint compound or PTFE tape on the threads to ensure leak resistance. Final tightening should be performed with tools rated for brass connections to avoid over-torquing and thread distortion. Ideal for use where dimensional precision and lead-free certification are required.

Application Scenarios

• Potable water supply lines
• Domestic hot water loops
• Hydronic heating systems
• Transition fittings in service and repair work

Regulatory Compliance

Brass fittings used in potable water systems must meet federal lead-free requirements under the Safe Drinking Water Act. This fitting is certified to meet those standards, ensuring system compliance across all U.S. jurisdictions.

Technical Summary

• Nominal Size: 1/2" NPT
• Overall Length: 4 inches
• Material Composition: Lead-free brass (typically C46500 or equivalent)
• Ends: Male NPT x Male NPT
• Standards: NSF/ANSI 61 & 372, ANSI B1.20.1

The 1/2" x 4" brass pipe nipple offers a reliable, code-compliant solution for threaded piping configurations requiring extended reach. Its corrosion-resistant construction and certified lead-free alloy make it suitable for both new construction and system retrofits in environments demanding performance and material integrity.