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The MIDLAND INDUSTRIES 77608 is a copper sweat union designed for joining and disconnecting sections of copper tubing in plumbing and mechanical piping systems. This fitting connects two 2-inch copper lines using sweat (solder) connections on both ends, allowing a piping run to be broken and reassembled without cutting. Unions are a standard component in service-accessible piping runs, particularly where equipment isolation and future serviceability are required. The all-copper construction provides corrosion resistance and compatibility with potable water, hydronic heating, and refrigeration piping applications.
This union is suited for residential and light commercial plumbing, HVAC hydronic systems, and mechanical piping installations where 2-inch copper tubing is used. It is typically installed by licensed plumbers and pipefitters working on water distribution, heating loops, or equipment connections that require periodic disconnection for service or replacement. The sweat connection method requires standard soldering tools and flux-compatible copper fittings practice.
Designed as an OEM-style replacement or new-installation fitting for 2-inch copper sweat piping systems in residential and commercial plumbing and HVAC hydronic applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and drain the water or system fluid completely before soldering to prevent steam buildup and ensure a clean, dry joint. Use appropriate lead-free solder and flux rated for the intended service. Allow the joint to cool fully before restoring system pressure.
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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