Merit Brass 4004-150 Stainless Steel Pipe Nipple 1/4 in Sch 40

Product Description

The MERIT BRASS 4004-150 is a welded stainless steel pipe nipple rated for Schedule 40 service, manufactured from Grade 304/304L stainless steel. This nipple provides a threaded connection point in piping assemblies where corrosion resistance and structural integrity are required. It carries a nominal pipe size of 1/4 inch with matching 1/4-inch thread size. Plumbers, pipefitters, and mechanical contractors install this type of fitting in fluid handling, instrumentation, and process piping systems where stainless material is called for by design or code.

This nipple is suited for residential and light commercial plumbing, HVAC condensate and process piping, and industrial instrumentation lines where Grade 304 or 304L stainless steel is specified. The 304L designation indicates a low-carbon variant, which reduces the risk of sensitization during welding, making it appropriate for fabricated assemblies and systems that see elevated service temperatures or require weld-adjacent fittings.

Key Features

• Grade 304/304L stainless steel construction provides corrosion resistance in wet and chemical-exposure environments
• Welded construction meets Schedule 40 wall thickness requirements
• 1/4-inch nominal pipe size with 1/4-inch NPT thread
• Low-carbon 304L alloy minimizes sensitization risk in welded assemblies
• Lightweight at 0.044 pounds for easy handling in close-quarter installations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Schedule 40 stainless steel piping systems using 1/4-inch NPT threaded connections.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC or ASME B31 piping code requirements. Shut off and depressurize the system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape rated for stainless steel and the intended service fluid. Do not overtighten NPT threads, as stainless steel is susceptible to galling.