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The MIDLAND INDUSTRIES 26079 is a captive sleeve reducing union designed to join two compression lines of different sizes in a single, leak-resistant connection. The fitting connects a 3/8-inch compression end to a 1/4-inch compression end, using thread specifications of 9/16-24 on the larger side and 7/16-20 on the smaller side. Constructed from brass, it delivers reliable corrosion resistance in both gas and fluid service applications. The captive sleeve design keeps the ferrule retained on the fitting body, reducing the chance of lost components during installation. Rated for service from -65 to 250 degrees F, this union suits a wide range of operating environments. Plumbers, HVAC technicians, and refrigeration contractors are the primary installers.
This reducing union is used in residential and light commercial applications where a transition between 3/8-inch and 1/4-inch compression tubing is required. Typical install scenarios include instrumentation lines, refrigeration copper tubing runs, fuel gas distribution at appliance connections, and general fluid control piping. The captive sleeve compression fitting style is common in situations where disassembly and reassembly may occur over the service life of the system. The brass construction makes it well suited for natural gas, LP gas, air, water, and compatible refrigerant service where compression fittings are code-permitted.
Designed as an OEM-style replacement or new-installation component for systems requiring a 3/8-inch to 1/4-inch captive sleeve compression reducing union in brass.
Installation is typically performed by a licensed plumber, HVAC technician, or refrigeration mechanic. Shut off and depressurize the line before disassembly or connection. Hand-tighten the compression nut first, then advance with a wrench per standard compression fitting practice - do not overtighten, as brass compression fittings can be damaged by excessive torque. Verify that the application and fluid service are code-permitted for compression-style fittings under the applicable IPC or IFGC requirements.
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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