Midland Industries 18144 Brass Compression Adapter

Product Description

The MIDLAND INDUSTRIES 18144 is a brass female adapter fitting designed to transition a 3/16 inch compression connection to a 1/4 inch female NPT (FNPTF) threaded port. Machined from brass, this adapter is rated to 400 psi and handles temperatures from -65 to 250 degrees F, making it suitable for a wide range of fluid and gas line applications. The hex body measures 0.68 inches across flats, and the center-to-end dimension is 0.96 inches. Plumbers, HVAC technicians, and refrigeration mechanics routinely use fittings of this type to interface compression tubing runs with threaded manifolds, valves, or equipment ports.

This adapter is intended for use with copper, aluminum, and thermoplastic tubing in residential and light commercial systems. Typical install scenarios include instrumentation lines, fuel lines, refrigerant-adjacent control tubing, and hydraulic or pneumatic low-pressure circuits. The 3/8-24 compression thread mates with standard 3/16 inch tube ferrules, while the 1/4-18 NPT female end accepts standard tapered male pipe threads.

Key Features

• 3/16 inch compression inlet to 1/4 inch FNPTF outlet configuration
• Rated to 400 psi working pressure
• Temperature range: -65 to 250 degrees F
• Brass construction resists corrosion in fluid and gas service
• Compatible with copper, aluminum, and thermoplastic tubing
• 0.68 inch hex for standard wrench engagement

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing in compression fitting applications requiring a 3/16 inch compression to 1/4 inch FNPTF transition.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician familiar with compression fittings and NPT thread connections. Shut off and depressurize the line before disassembly or fitting installation. Apply an appropriate thread sealant to the FNPTF threads per the fitting manufacturer and applicable plumbing code requirements; do not overtighten, as brass threads can be damaged by excessive force. Verify all connections are leak-free under system pressure before returning the line to service.