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The DIVERSITECH DU1-10E is a brass flare-to-male iron pipe (MIP) union fitting designed to connect flared refrigerant or gas tubing to a threaded pipe system. The flare end accepts a 3/4 inch connection, while the MIP outlet is sized at 1/2 inch. Constructed from brass, this fitting provides reliable sealing at both ends when installed correctly. It is a standard component used in HVAC refrigerant line assemblies, gas piping systems, and plumbing applications where a transition from flared tubing to threaded pipe is required. Licensed HVAC technicians and plumbers are the primary installers of this fitting type.
This union fitting is suited for residential and light commercial applications where a flare-to-pipe transition is needed. Common install scenarios include connecting refrigerant line sets to service valves, joining copper flare tubing to threaded brass or iron pipe fittings, and similar transitions in gas or fluid piping. Its compact union design allows for disconnection without disturbing the surrounding piping, which is useful during serviceability-focused installations.
Designed as an OEM-style replacement or new-installation fitting for HVAC, gas, and plumbing systems requiring a flare-to-male iron pipe thread transition at 3/4 inch by 1/2 inch sizing.
Installation should be performed by a licensed HVAC technician or plumber in accordance with applicable local codes, the IFGC, or IPC as appropriate for the system type. Shut off all gas or refrigerant supply and relieve system pressure before working on any fitting. Verify the flare is properly formed and free of cracks or deformation before seating, and apply approved thread sealant or tape to the MIP connection before tightening. Do not overtighten the flare nut, as brass flare fittings can be damaged by excessive torque.
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