Abstract: A self contained mobile refrigerant recovery and purification system in which refrigerant is withdrawn through a filter/dryer in liquid or vapor phase and then to a holding tank through a heat exchanger located within the tank. The flow of the recovered refrigerant through the heat exchanger is utilized to regulate the pressure within the tank, reducing the pressure to effect withdrawal and elevating the pressure to effect recharging of the serviced refrigeration system. After refrigerant withdrawal is complete, liquid refrigerant within the holding tank is cycled from the holding tank through the filter/dryer and back to the holding tank. The reclaimed refrigerant can then be transferred back to the serviced system in either liquid or vapor form as desired. Between recovery jobs the recovery system can be cleansed out by cycling a cleansed and pumped out by cycling a clean refrigerant through the filter/dryer and the holding tank.