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The MIDLAND INDUSTRIES 18326 is a forged brass branch tee fitting designed for use in compression-based tubing systems. It provides a three-port connection with 1/2-inch compression inlets on two ports and a 1/8-inch female National Pipe Thread Fine (FNPTF) outlet on the third. The fitting is rated for up to 200 psi and handles temperatures from -65 to 250 degrees F, making it suitable for a wide range of plumbing, HVAC, and fluid-distribution applications. Its forged brass construction delivers reliable strength and corrosion resistance. Plumbers, HVAC technicians, and mechanical contractors typically install this fitting during new construction or retrofit work on copper, aluminum, or thermoplastic tubing systems.
This branch tee is intended for residential and light commercial applications where a reliable compression-to-FNPTF branch connection is needed. The 11/16-20 x 1/8-27 thread specification matches standard compression and pipe thread tooling. With a body size of 0.59 inches and a center-to-end dimension of 0.94 x 0.75 inches, it fits in tight spaces within valve assemblies, instrumentation taps, or distribution manifolds. It is compatible with copper, aluminum, and thermoplastic tubing, making it a versatile choice across multiple system types.
Designed for use with copper, aluminum, and thermoplastic tubing systems requiring a compression branch tee with a 1/8-inch FNPTF port connection.
Installation should be performed by a licensed plumber or qualified HVAC technician following applicable IPC or IFGC guidelines. Shut off and depressurize the system before disassembly or fitting installation. Compression fittings require proper tube preparation including squaring and deburring the tube end to achieve a leak-free seal. Do not overtighten the compression nut, as this can damage the ferrule or tubing.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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