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The DIRECTEDAIR da03rs-04 is a copper coupling with roll stop designed for refrigerant and HVAC piping applications. The roll stop feature provides a positive seat for consistent insertion depth, ensuring reliable, repeatable joints during brazing or soldering. Both connection ends are 3/8 inch copper, making this a same-size inline coupling. Licensed HVAC technicians and refrigeration mechanics working on copper line set installations or repairs will find this fitting suited to standard field joinery work.
This coupling is intended for use in residential and light commercial HVAC and refrigeration piping systems where copper-to-copper connections are required. It is appropriate for new installations and service repairs involving 3/8 inch copper tubing, including suction or liquid line work on split systems and other refrigerant circuits.
Designed as an OEM-style replacement or new-installation fitting for 3/8 inch copper tubing in residential and light commercial HVAC and refrigeration piping systems.
Installation should be performed by a licensed HVAC or refrigeration technician. Recover and isolate refrigerant before cutting into an existing line set in accordance with EPA Section 608 regulations. Clean and deburr tubing ends before seating them fully against the roll stop, then braze or solder using appropriate flux and filler material per manufacturer and local mechanical code requirements.
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