Our Copper Fittings & Adapters category includes the essential sweat and flare components needed to build clean, reliable and leak-free HVAC refrigeration and line-set connections. Copper is the industry standard for refrigerant transport due to its strength, temperature resistance and long-term reliability — and every fitting you choose directly affects system performance, efficiency and serviceability.
Here you will find copper elbows, couplings, tees, reducers, long-radius bends, flare fittings, swage adapters, line-set transition fittings and HVAC-grade solder joints. These fittings are designed for residential, commercial and mini-split installations that demand precision. All options are engineered for compatibility with common HVAC line sizes, including 1/4", 3/8", 1/2", 5/8", 3/4" and 7/8", with select fittings suitable for high-pressure R-410A and modern variable-speed systems.
When selecting copper fittings, confirm refrigeration compatibility, proper wall thickness, and match the fitting type to the joint: flare connections for mini-splits and service valves, solder (sweat) fittings for sealed refrigeration loops, and long-radius fittings when maintaining pressure drop is critical.
Pro tip: Always use Nitrogen purge during brazing to prevent oxidation inside the tubing. Clean internal surfaces ensure proper refrigerant flow and protect the compressor from contamination.
Copper HVAC fittings include elbows, couplings, reducers, flare fittings, tees and swage adapters sized for 1/4 to 7/8 inch refrigerant lines. Used for mini-splits, heat pumps, condensers and commercial HVAC systems.
