Merit Brass 8004-400 Aluminum Pipe Nipple Sch 40

Product Description

The MERIT BRASS 8004-400 is a Schedule 40 aluminum pipe nipple designed for low-pressure piping systems requiring lightweight, corrosion-resistant fittings. Machined from 6061 aluminum alloy, this nipple measures 1/4 inch nominal pipe size by 4 inches in length and is threaded on both ends for standard NPT connections. At 0.048 pounds, it is well-suited for instrument air lines, pneumatic systems, and fluid transfer applications where steel weight or corrosion potential is a concern. Licensed plumbers and pipefitters are the typical installers, though HVAC and industrial maintenance technicians also work with aluminum nipples in low-pressure applications.

This nipple fits into residential and light commercial piping assemblies where 1/4 inch NPT fittings are specified. The 6061 aluminum construction makes it appropriate for dry air, inert gas, and certain fluid service lines. It is not recommended for high-pressure steam or applications requiring ferrous fittings. Typical uses include instrument connections, gauge installations, and short-run pipe extensions in plumbing and mechanical systems that comply with OSHA piping standards.

Key Features

• 6061 aluminum alloy construction for corrosion resistance and light weight
• Schedule 40 wall thickness for standard-duty pressure service
• Threaded on both ends for straightforward NPT connections
• 1/4 inch nominal pipe size x 4 inches in length
• Meets OSHA standards per supplier specifications
• Weighs 0.048 pounds — reduces load in weight-sensitive assemblies

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4 inch NPT piping systems requiring Schedule 40 aluminum pipe nipples.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter following applicable IPC and OSHA guidelines. Shut off and depressurize the line before removing or installing any threaded fittings. Use thread sealant or PTFE tape rated for aluminum and the specific service fluid. Do not overtighten — aluminum threads are softer than steel and can be damaged by excessive torque.