Abstract: A machine and co-operating apparatus with method to variably adjust delivery pressure reducing apparatus to complement removal of the different types of refrigerant from disabled refrigeration units in liquid or vapor form. Recovery tank, and system are vacumn evacuated by recovery system condensing unit before recovery is started by freeze chilling recovery tank removably enclosed within separate refrigerant supplied refrigeration unit evaporator cabinet to establish wide temperature difference between disabled refrigeration unit, and recovery tank utilizing co-operating pressure reducing apparatus to enable cool low pressure flow of liquid refrigerant to said tank. Same apparatus allows disabled refrigeration unit's supply pressure of refrigerant to remain stabilized throughout recovery procedure. Said pressure maintenance prevents freezing of water cooled condensers and chiller evaporators.