recovery system 11 may be utilized for purposes of illustration air conditioning system 91 is shown as being an automotive system such as those installed in cars and trucks but could be of another type such those used in residential and commercial buildings air conditioning system 91 has a compressor 93 with inlet and outlet fittings 95 97 an evaporator 99 having inlet and outlet fittings 101 103 an expansion valve 105 and a condenser 107 having inlet and outlet fittings 109 111 these four components of the air conditioning system 91 are operatively interconnected by system conduit means including a conduit 113 a conduit 115 and a conduit 117 in which the expansion valve 105 is removably interposed first ends of the conduits 113 115 are secured to a block type connection fitting 119 removably attached to the inlet and outlet fittings 95 97 of compressor 93 and the opposite ends of conduits 113 115 are secured to connection fittings 121 123 removably attached to the evaporator outlet fitting 103 and the condenser inlet fitting 109 respectively one end of conduit 117 is secured to a connection fitting 125 removably attached to the condenser outlet fitting 111 and the other end of conduit 117 is secured to a connection fitting 127 removably attached to the evaporator inlet fitting 101 turning now to fig3 the flushing adapter kit 80 includes the flushing hoses 79 and 81 the filter 83 a sight glass 129 a schrader tee 131 and a strainer 133 the filter.