Refrigeration Fittings for Refrigeration. Refrigeration Fittings: Elbow,Coupling, Tee, Union. Fittings: Red Copper. 1. Copper Fittings for Air-Conditioner, Refrigeration.2. It has: Elbow, Coupling, Tee, Union,P-Trap.3. Standard: ANSI B16.224. Package: Carton box. (1/4"-4 1/8")Refrigeration Fitting