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Flojet G573256A Series G57 Air Operated Diaphragm Pump - 5 GPM, 3/4in, Viton

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1.70 lbs
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This compact air operated double diaphragm pump is designed for ultimate performance and reliability. The robust design combines innovative engineering and relentless testing to offer a unit with a long, trouble free service life.
Prep 65

Prop 65


Technical Specifications

Inlet Port: 3/4 inch
Max GPM: 5
Max PSI: 100
Max Temperature: 120 degrees F

Product Description

Air Powered Transfer Pump

The Flojet G573256A is a G57 Series model with polypropylene housing, Viton diaphragm, check valve seat and O-rings, Hastelloy springs, and is driven by an internal air motor. This air operated duplex diaphragm pump has leak resistant radial seals, eliminating the need for critical O-ring seals. With large clog free check valves and a unique shuttle valve, blockage and stalling are all but eliminated. The air or CO2 inlet can handle pressures up to 100 PSI and has a large exhaust muffler for quiet operation. The high air or CO2 inlet pressure capability makes it the ultimate pump that delivers fluid at the needed flow and pressure. This pump is self-priming and should be mounted in a dry and adequately ventilated area. 


  • Application: Oil, Transmission, Differential Fluid
  • Diaphragm & Check Valve Materials: VITON¨
  • Check Valve Spring: Hastelloy¨
  • Pump Body: Polypropylene
  • Liquid Connection: 3/4" Hose Barb 
  • Flow Rate: 5 GPM
  • Air Supply Pressure 20 - 100 PSI
  • Temperature Range 40 - 120°F
  • Self-Priming Up to 15 ft.

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm (For more information go to

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