Abstract: A device for recharging an a/c system with dye containing refrigerant using recovery/recycle/recharging equipment. The device connects to the recovery/recycle/recharging equipment so as to allow the refrigerant/dye mixture to bypass the purification process of such equipment and has a main valve having first and second inlets and an outlet. The first inlet connects to a source of refrigerant/dye mixture, the second inlet connects to the recovery/recycle/recharging equipment and the internal refrigerant tank therein, and the outlet connects to the a/c system to be recharged. The main valve is operable to provide a first fluid path from the first inlet to the outlet while isolating the second inlet, and a second fluid path from the second inlet to the outlet while isolating the first inlet. In operation the device allows the isolation of the recovery/recycle/recharging equipment refrigerant tank while virgin refrigerant with dye is added to the a/c system.