HBP - High Back Pressure APPLICATION, R134a Refrigerant, 115V 1 Phase 60Hz / 100V 1 Phase 50Hz 3/4 HP, High Start Torque (HST) 9009 BTU Capacity, 5/8" FLARE (SAE) SUCTION LINE SIZE, 0.3125" Sweat (5/16" ODF) DISCHARGE LINE SIZE, Reciprocating Compressor (Model:AJA4492YXA)