Check the listing for details. Gast 0523 1/4 HP Rotary Vane Air Compressor. Condition: New. Listed at 670.00 USD. The Gast 0523 Rotary Vane Air Compressor is a rotary vane type compressor/vacuum pump used for 500GPD aerobic septic tanks. This pump can be used as a compatible replacement for Gast 0323, 0523, RV03, RV05, Thomas QR-0030 and QR-0050 units. The Gast 0523 Rotary Vane Air Compressor pump includes an internal muffler and filter silenced for quieter operation, a thermal protector to protect the motor from overheating and burning out as well as an integrated foot support assembly to make mounting the 0523 pump easier. The rugged Gast 0523 has a tough cast iron housing and sealed bearings providing a low maintenance and durable solution for just about any low pressure application. SPECIFICATIONS Thermal Protection: NO Operating Voltage: 208-220/440 Vanes: 4 Flow @ 60hz: 4.5 cfm ( 7.65 m3h ) Max Pressure: 10 psi ( 0.69 bar ) Max Pressure @ 60hz: 10 psi ( 0.69 bar ) Max Vacuum @ 60hz‎: 26 in-hg ( 880.46 mbar ) Amps Running @ 50hz: 1.4 Amps Running @ 60hz: 0.7 Duty Cycle: 100%