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The DAKOTA SOURCING 13113 is a reducing coupling designed to connect tubing or piping of two different outside diameters. One end accepts 1/2-inch OD tubing and the other accepts 3/8-inch OD tubing, making it a straight-run reducer for systems where a diameter transition is required. This type of fitting is commonly installed by plumbers, HVAC technicians, and refrigeration mechanics working on fluid or refrigerant lines that change size between components or at connection points.
This coupling is suited for residential and light commercial applications where a clean, inline transition between 1/2-inch OD and 3/8-inch OD lines is needed. Typical install scenarios include refrigeration line sets, hydraulic tubing runs, or plumbing supply lines where a size step-down must be made without adding elbows or additional fittings. It is sold as a single unit.
Designed as an OEM-style reducing coupling for use with standard 1/2-inch OD and 3/8-inch OD tubing in plumbing, HVAC, or refrigeration applications.
Installation should be performed by a licensed plumber, HVAC technician, or qualified refrigeration mechanic following applicable local codes. Shut off fluid supply or recover refrigerant from the system before cutting into any line. Verify that the tubing outside diameters on both sides of the connection match the fitting ends before joining. Use appropriate joining methods for the tubing material and system type.
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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