ActronAir Discharge Pipe Compressor to Muffler (L-Shape) is the factory-specific L-shaped copper tube that connects the compressor discharge port to the discharge muffler on compatible R22 ActronAir outdoor units. The L-shape and specific dimensions are designed to provide the correct refrigerant velocity and vibration isolation between the compressor and muffler -- a substitute straight pipe or incorrect length alters discharge pulsation characteristics. Isolate power and recover all refrigerant before replacing any discharge line components.