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The MIDLAND INDUSTRIES 77599 is a reducing copper sweat tee designed for use in professional plumbing and mechanical piping systems. This fitting connects two 6-inch copper lines on the run with a 4-inch copper branch outlet, all joined by soldered sweat connections. Weighing 14.15 pounds, it is a heavy, full-copper fitting suited for large-diameter commercial and industrial water distribution, hydronic heating, or similar copper piping applications. Licensed plumbers and pipefitters are the typical installers for a fitting of this size and type.
This tee is used in large-diameter copper piping systems where a reducing branch connection is required. Common applications include commercial plumbing mains, hydronic heating and chilled water distribution loops, and industrial process water lines. The sweat connection type requires soldering on all three ports, making it appropriate for permanent, pressure-rated copper installations. Its size class places it firmly in commercial and light industrial service rather than typical residential work.
Designed as an OEM-style sweat fitting for large-diameter copper piping systems using standard sweat-joint connections on 6-inch run and 4-inch branch copper pipe.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IAPMO or IPC standards. Shut off and depressurize the water or fluid system completely before cutting into existing lines. Clean and flux all mating pipe ends thoroughly before applying heat; overheating large-diameter copper fittings can damage the fitting or result in poor solder joints. Allow all connections to cool fully before restoring system pressure and inspecting for leaks.
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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