Midland Industries 18231 Brass Compression Elbow 5/16 Od X 1/2 Nptf

Product Description

The MIDLAND INDUSTRIES 18231 is a 90-degree brass compression elbow fitting designed to connect tubing to a male NPTF threaded port. It accepts a 5/16-inch tube OD on one end and a 1/2-inch male NPTF thread on the other, with a 1/2-24 by 1/2-14 thread specification. The body is forged brass, providing reliable mechanical strength in compressed-air, fuel, and fluid-handling applications. Rated to 300 psi and a temperature range of -65 to 250 degrees F, this fitting suits demanding service environments. It is installed by licensed plumbers, HVAC technicians, and refrigeration mechanics working on tubing runs that require a 90-degree direction change at a threaded port connection.

The 18231 is suited for residential and light commercial plumbing, HVAC, and pneumatic systems where a compact elbow transition is needed between soft tubing and a threaded fitting. It is compatible with copper, aluminum, and thermoplastic tubing, making it a versatile choice across multiple tubing materials. The compression-style connection eliminates the need for soldering or flaring at the tube end, which speeds up installation in tight spaces or retrofit work.

Key Features

• 90-degree elbow configuration for direction changes at threaded ports
• Forged brass construction for durability and corrosion resistance
• 300 psi pressure rating for demanding fluid and pneumatic service
• Wide temperature range: -65 to 250 degrees F
• Compatible with copper, aluminum, and thermoplastic tubing
• Compression connection requires no soldering or flaring at the tube end

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing in compression-style fitting applications requiring a 5/16-inch tube OD to 1/2-inch male NPTF connection.

Installation Notes

This fitting should be installed by a qualified plumber or HVAC technician following applicable local plumbing codes and IFGC requirements. Shut off the fluid or gas supply and depressurize the line before making or breaking any fitting connection. Ensure the tube end is cut cleanly and deburred before seating it in the compression fitting to prevent leaks. Do not overtighten the compression nut, as this can distort the ferrule and compromise the seal.