Midland Industries 28183 Brass Reducing Coupling 3/8 X 1/4 Nptf

Product Description

The MIDLAND INDUSTRIES 28183 is a brass reducing coupling designed to connect two female NPTF-threaded pipe ends of different sizes. It transitions from a 3/8-18 NPTF thread on one end to a 1/4-18 NPTF thread on the other, allowing technicians to step down pipe diameter within a pressurized fluid or gas system. The fitting is rated to 1200 psi and handles temperatures from -65 to 250 degrees F, making it suitable for a wide range of mechanical piping applications. The 0.87-inch hex body allows standard wrench engagement for a secure, leak-free assembly.

This reducing coupling is used in residential and commercial piping systems where a reduction from 3/8-inch to 1/4-inch pipe is required. Typical install scenarios include HVAC refrigerant-line accessories, pneumatic lines, hydraulic systems, and general plumbing distribution runs. Plumbers, pipefitters, and HVAC technicians commonly use this fitting when reconfiguring or extending pipe runs that involve a change in line size. Its compact profile at approximately 1.16 inches in length suits tight installations.

Key Features

• 3/8-18 NPTF to 1/4-18 NPTF thread configuration for female-to-female reducing connections
• 1200 psi pressure rating for demanding pressurized system applications
• Operating temperature range of -65 to 250 degrees F
• 0.87-inch hex flat for positive wrench engagement without slipping
• Brass construction offers corrosion resistance and long service life in piping systems

Compatibility

Compatible for use with brass, bronze, copper, steel, aluminum, and iron pipe systems requiring a 3/8-inch to 1/4-inch female NPTF reducing connection.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local mechanical codes. Shut off and depressurize the system completely before removing or installing any fitting. Apply an appropriate thread sealant or PTFE tape to NPTF threads as required by the system fluid and code requirements. Do not overtighten; use the hex flats with a properly sized wrench to achieve a secure connection without stressing the fitting body.