Merit Brass 3612D-0806 Pipe Reducer 1/2 X 3/8 in Fnpt 316SS

Product Description

The MERIT BRASS 3612D-0806 is a threaded pipe reducer fitting designed to connect a 1/2-inch female NPT line to a 3/8-inch female NPT line in industrial and commercial piping systems. Constructed from 316/316L stainless steel, it delivers strong corrosion resistance in harsh environments including those with chlorides, acids, or moisture exposure. Rated to 3,000 psi, this fitting is suited for high-pressure fluid and gas distribution applications. It is typically installed by licensed plumbers, pipefitters, or HVAC-R technicians working on process piping, instrument lines, or mechanical systems requiring a durable stainless steel transition between two female-threaded pipe sizes.

This reducer fitting is appropriate for residential, commercial, and light industrial piping applications where a reduction from 1/2-inch to 3/8-inch NPT is required. Common install scenarios include instrumentation supply lines, chemical process piping, hydraulic systems, and HVAC refrigerant or condensate piping where corrosion-resistant fittings are specified. The dual 316/316L material grade makes it compatible with both standard and low-carbon stainless steel piping systems, and the FNPT x FNPT configuration allows direct threaded engagement on both ends without additional adapters.

Key Features

• 316/316L stainless steel construction provides superior corrosion resistance in wet, chemical, and marine environments
• 3,000 psi pressure rating supports high-pressure piping and instrumentation applications
• FNPT x FNPT threaded connection on both ends for straightforward installation without special tooling
• Reduces from 1/2-inch to 3/8-inch pipe size in a single fitting
• Low-carbon 316L grade minimizes sensitization risk in welded or heat-affected assemblies

Compatibility

Designed as an OEM-style threaded pipe reducer for 1/2-inch x 3/8-inch FNPT piping systems requiring 316 or 316L stainless steel fittings rated to 3,000 psi.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or ASME B31 piping codes. Isolate and depressurize the line completely before removing or installing any fitting. Apply an appropriate thread sealant or PTFE tape rated for the service fluid and pressure before threading the fitting into place. Do not over-torque the threaded connections, as stainless steel fittings are susceptible to galling.