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A German-made reciprocating triplex plunger pump.

Aluminum crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; solid ceramic plungers; nitrile seals (with fabric reinforcing); stainless steel valves and manifold.

Gearbox and bell housings (to connect to gasoline, diesel, electric or hydraulic drive).

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Flow1.3 GPM5.1 L/min
Maximum Discharge Pressure5000 PSI350 bar
Crankshaft Speed1420 RPM
Power4.5 HP3.4 KW
Crankshaft Speed (High)1.3 RPM
Intermittent Flow1.3 GPM5.1 L/min
Intermittent Discharge Pressure6525 PSI450 bar
Intermittent Crankshaft Speed1420 RPM
Intermittent Power Consumption5.9 HP4.4 HP
Max Temperature160 °F70 °C
Inlet Port Size(2) 1/2" BSP
Discharge Port Size(2) 3/8" BSP
Plunger Diameter0.47 in.12 mm
Stroke0.47 in.18.1 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter0.87 in.22 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity15.2 fl. oz. 0.45 L
Weight17.2 lbs.7.8 kg

Horsepower Specifications

RPM GPM 3000 PSI 4000 PSI 5000 PSI 6525 PSI*
500 0.5 1.0 1.4 1.7 2.3
750 0.7 1.4 1.9 2.4 3.2
1000 0.9 1.9 2.5 3.1 4.1
1250 1.1 2.3 3.0 3.8 5.0
1420 1.3 2.7 3.6 4.5 5.9

Specification Images

Additional Drawings

  • P57 Exploded View
  • P57 Parts List


  • Giant Industries Limited Warranty
  • P57 Installation Instructions
  • P57 Repair Instructions
  • Troubleshooting Guide


Sample Pump

Our Company

For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.

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