Midland Industries 18142 1/8 in Compression X Fnptf Adapter

Product Description

The MIDLAND INDUSTRIES 18142 is a brass compression-to-female pipe thread adapter designed to connect compression tubing lines to female NPT ports. It transitions a 1/8 inch compression fitting to a 1/8 inch FNPTF (female national pipe thread fuel) connection, making it useful wherever a compression tube must terminate at a threaded port. The fitting uses a 5/16-24 x 1/8-27 thread specification and a 0.56 inch hex for wrench engagement. Rated to 400 psi and a temperature range of -65 to 250 degrees F, this adapter handles demanding service conditions in tight plumbing and instrumentation applications. Licensed plumbers and HVAC technicians are the typical installers.

This adapter is suited for residential and light commercial applications where copper, aluminum, or thermoplastic tubing must interface with a female NPT port. Common install scenarios include fuel gas instrumentation, refrigeration sensing lines, compressed air distribution, and low-pressure fluid control systems. The compact body measures approximately 1 inch in height and 0.5 inches in length, keeping the assembly tight in confined spaces. The center-to-end dimension is 3/4 inch, which aids in planning layout clearances during assembly.

Key Features

• Transitions 1/8 inch compression tubing to a 1/8 inch FNPTF threaded port
• Rated to 400 psi working pressure
• Operating temperature range of -65 to 250 degrees F
• Compatible with copper, aluminum, and thermoplastic tubing
• 0.56 inch hex allows standard wrench installation
• Brass construction resists corrosion in fluid and gas service

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing in compression fitting systems terminating at 1/8 inch FNPTF ports.

Installation Notes

Installation is typically performed by licensed plumbers or HVAC technicians. Shut off and depressurize the system completely before removing or installing any compression fittings. Use a properly sized wrench on the hex to avoid deforming the fitting body - do not overtighten by hand or use pipe wrenches on the compression nut. Follow applicable local codes and IPC or IFGC guidelines for the system type being serviced.