Abstract: A refrigerant recovery unit for large refrigerant systems has a suction compressor which withdraws vapor and a liquid pump which withdraws liquid refrigerant. The compressor and liquid pump pass the fluids to a heat exchanger and a condenser, both located within a bath of chilled liquid. The vapor condenses into a liquid and combines with the liquid refrigerant. The liquid passes to a storage tank. A feedback compressor withdraws vapor from the upper portion of the tank if the pressure is above a selected level and passes it to the condenser for further condensation. A bypass line directs refrigerant vapor to the inlet of the feedback compressor if the tank vapor pressure is below the selected level. A drawdown line allows the feedback compressor to draw all of the refrigerant from the recovery unit after the recovery unit has recovered the refrigerant from the refrigeration system.