Merit Brass 3412D-0602 Pipe Reducer 3/8 X 1/8 in Ss 3000 Psi

Product Description

The MERIT BRASS 3412D-0602 is a threaded pipe reducer fitting designed to connect pipe runs of different diameters in high-pressure fluid and gas systems. Machined from 304/304L stainless steel, it offers solid corrosion resistance in wet, chemical-exposed, or outdoor environments. The fitting reduces from a 3/8-inch female NPT inlet to a 1/8-inch female NPT outlet and carries a pressure rating of 3000 psi, making it appropriate for demanding industrial and commercial plumbing, instrumentation, and pneumatic lines. Licensed plumbers, pipefitters, and mechanical contractors install this type of fitting in both new construction and retrofit applications.

This reducer is suited for use in residential and commercial mechanical systems wherever a threaded pipe size transition is needed between 3/8-inch and 1/8-inch lines. Typical applications include instrument tubing connections, compressed air distribution, hydraulic lines, and chemical process piping. The FNPT x FNPT configuration allows straightforward installation into existing threaded pipe assemblies without welding or special tooling beyond standard pipe wrenches and thread sealant.

Key Features

• 304/304L stainless steel construction provides corrosion resistance in wet and chemical service environments
• 3000 psi pressure rating supports high-pressure fluid and gas applications
• FNPT x FNPT threaded end connections for tool-accessible installation without welding
• Reduces from 3/8-inch to 1/8-inch pipe size in a single fitting
• Dual-grade 304/304L material meets a wide range of weld and non-weld service requirements

Compatibility

Designed as an OEM-style threaded pipe reducer for use in 3/8-inch to 1/8-inch NPT threaded piping systems requiring stainless steel construction and high-pressure service ratings.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or ASME B31 piping codes. Depressurize and isolate the line completely before disassembling any fittings. Apply an appropriate thread sealant or PTFE tape to the male threads being engaged, and tighten with a pipe wrench to a snug, leak-free fit. Do not overtighten stainless steel threaded fittings, as galling can occur.