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The MIDLAND INDUSTRIES 00086-0610 is a brass compression-to-sweat adapter designed to connect 3/8-inch compression fittings to 5/8-inch sweat (solder) connections in plumbing and mechanical systems. The fitting features a 9/16-24 thread and is rated for pressures up to 200 psi with a temperature range of -65 to 250 degrees F. Machined from brass, it provides corrosion resistance and durability in both residential and light commercial applications. Plumbers and pipefitters use this adapter when transitioning between compression-style tubing connections and copper sweat joints in a single fitting body.
This adapter is suited for residential plumbing, HVAC refrigerant line work, and mechanical systems where a transition from compression to sweat end connections is required. It is rated for use with copper tubing, aluminum tubing, and thermoplastic tubing, making it a versatile fitting for multi-material installations. Typical applications include water supply lines, refrigeration piping, and gas distribution systems within the fitting's rated pressure and temperature limits.
Designed for use with copper, aluminum, and thermoplastic tubing in compression and sweat connection systems rated within the 200 psi and -65 to 250 degrees F operating range.
Installation should be performed by a licensed plumber or pipefitter following applicable IPC and local mechanical code requirements. Shut off and depressurize the system completely before disassembling existing connections or making new ones. When making the sweat end connection, use appropriate flux and solder for the tubing material and allow the joint to cool fully before pressurizing. Do not overtighten the compression nut, as brass fittings can crack under excessive torque.
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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