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Flojet G57C142A PushLock 5 GPM Air Operated Diaphragm Pump - Kalrez, 1/2 Inch

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1.70 lbs
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This G57 pump has a tough polypropylene body and a Kalrez diaphragm. 5 GPM, 1/2" fittings, 1/4" air inlet.
Prep 65

Prop 65


Technical Specifications

Max PSI: 100
Inlet Port: 1/2 inch
Max GPM: 5

Product Description

5 GPM Polypropylene Air Pump with Kalrez

The Flojet G57C142A air pump is from the G57 Series. This air-operated diaphragm pump has a polypropylene body and boasts a Kalrez (FFKM) diaphragm and check valves. It has a 5 GPM flow rate, 1/2" JG PushLock fittings, and a 1/4" hose barb inlet.

G57 Pump Series Info:

  • Flojet's most popular air-operated diaphragm pump. Innovative compact design features a patented shuttle valve that eliminates stalling and provides a long life. These pumps boast a polypropylene body and high-quality elastomers that offer incredible chemical resistance. Quick-disconnect liquid and gas port fittings for easy installation.


  • 5 GPM flow rate
  • 1/2" John Guest push/lock product inlet/outlet
  • 1/4" brass hose barb air inlet
  • Chemical resistant polypropylene housing
  • Kalrez diaphragm and check valve seat
  • 100 PSI maximum pressure
  • 20 PSI minimum starting pressure


  • Highest flow rate for any air pump of comparable size
  • Stall-proof design with patented shuttle valve
  • Easy installation with all quick disconnect ports
  • Robust design with durable integral mounting
  • Sanitary design with inset molded diaphragm
  • Leak resistant radial seals, no critical o-ring seals
  • Quiet operation with large exhaust muffler

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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