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The MIDLAND INDUSTRIES 18162 is a brass female adapter fitting designed to transition between a 5/8 inch compression connection and a 1/2 inch female National Pipe Thread Fuel (FNPTF) connection. Built from brass for corrosion resistance and long service life, this adapter is rated to 150 psi and handles temperatures from -65 to 250 degrees F. The 13/16-18 compression thread mates with the 1/2-14 NPT female port, and the 1 inch hex allows standard wrench engagement. It is installed by licensed plumbers and HVAC technicians in both residential and light commercial applications where a reliable compression-to-threaded transition is required.
This adapter is suited for use in plumbing, refrigeration, and fluid-handling systems where copper, aluminum, or thermoplastic tubing must terminate into a female NPT threaded port. Common install scenarios include connecting supply lines, instrument ports, and distribution manifolds. The compact profile - 1.38 inches center to end - makes it practical in tight spaces where fitting clearance is limited.
Designed for use with copper, aluminum, and thermoplastic tubing in compression fitting applications requiring a female NPT threaded outlet connection.
Installation should be performed by a licensed plumber or qualified technician following applicable plumbing codes such as the IPC. Shut off supply pressure and depressurize the line before disassembly or fitting installation. Use a wrench on the 1 inch hex flats - do not grip the body of the fitting. Verify tubing is cut cleanly and deburred before seating in the compression end to ensure a leak-free connection.
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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