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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 forged brass manifold.

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

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
Flow9.9 GPM37.3 L/min
Maximum Discharge Pressure2610 PSI180 bar
Crankshaft Speed1450 RPM
Power17.8 HP13.3 KW
Crankshaft Speed (High)9.9 RPM
Intermittent Flow9.9 GPM37.3 L/min
Intermittent Discharge Pressure3000 PSI200 bar
Intermittent Crankshaft Speed1450 RPM
Intermittent Power Consumption20.5 HP15.3 kW
Max Temperature160 °F70 °C
Inlet Port Size(2) 1" NPT
Discharge Port Size(2) 3/4" NPT
Plunger Diameter0.87 in.22 mm
Stroke0.94 in.24 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft BoreSAE 2 B or SAE 4B 13T 16/32 Spline
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US30.4 fl. oz. 0.9 L
Weight38.3 lbs.17.4 kg
NPSHR9.3 mWs
Manifold Material Forged Brass
Crankcase Material Aluminum
Plunger Material Solid Ceramic Oxide
Valve Material High Grade Stainless Steel
Seal Material Nitrile with Fabric Reinforcing
The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.
Plunger Packing Kit – Part #09295
21 07266 O-Ring 3
23 06249 V-Sleeve with Support Ring 3
23B 13390 Weep Seal 3
24 06252 Pressure Ring 3
Valve Assembly Kit – Part #09143
27A 08408 Valve Assembly, Complete 6
33 07214 O-Ring 6
Oil Seal Kit – Part #09641
19 05444 Oil Seal 3

Horsepower Specifications

RPM GPM 1000 PSI 1500 PSI 2610 PSI 3000 PSI*
900 6.1 4.2 6.3 11.0 12.6
1050 7.2 5.0 7.5 13.0 14.9
1160 7.9 5.4 8.2 14.2 16.3
1300 8.9 6.1 9.2 16.0 18.4
1450 9.9 6.8 10.2 17.8 20.5

*Intermittent duty only!

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P422H Exploded View
  • P422H Parts List


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • P422H Installation Instructions
  • P422H Repair Instructions
  • Troubleshooting Guide

Sample Pump

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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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