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An American-made axial design positive displacement triplex plunger pump for direct drive only.

Aluminum crankcase, machined wobble plates, stainless steel thrust bearings, stainless steel plungers, nitrile seals (with fabric reinforcing), Delrin valves, forged brass manifold, integrated unloader, thermal relief valve and optional fixed or adjustable chemical injector.

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
Flow2.5 GPM9.5 L/min
Maximum Discharge Pressure2500 PSI172 bar
Crankshaft Speed3450 RPM
Power5.7 HP4.3 KW
Max Temperature80 °F27 °C
Inlet Port Size1/2" NPT
Discharge Port Size3/8" NPT
Plunger Diameter0.63 in.16 mm
Maximum Inlet Pressure90 PSI6.2 bar
Key Width (Horizontal)3/4" x 3/16"
Key Width (Vertical)7/8" x 3/16"
Crankcase Oil Capacity (Horizontal)4.1 fl. oz.
Crankcase Oil Capacity (Vertical)4.7 fl. oz. 138 mL
Weight9 lbs.4.1 kg
Manifold Material Brass
Crankcase Material Aluminum
Plunger Material Stainless Steel
Valve Material Delrin
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 #09465
20 06290 Support Ring 3
21 06315 V-Sleeve 3
Valve Assembly Kit – Part #09466
18 07374 Valve Spring 6
19 06267 Guided P-Valve 3
36 06295 Discharge Valve Cone 3
Oil Seal Kit – Part #09468
15 06316 Plunger Oil Seal 3
Unloader Repair Kit – Part #09467
23 12007 O-Ring 2
25 12031-0002 Back-up Ring 2
26 07937 O-Ring 2
27 08638 O-Ring 1
28 06256 Seat 1
29 06227 8mm ball 1
41 12326 O-Ring 1

Electric Horsepower Specifications

RPM GPM 1000 PSI 1500 PSI 2000 PSI 2500 PSI
3450 2.5 1.7 2.6 3.4 4.3

Gas Horsepower Specifications

RPM GPM 1000 PSI 1500 PSI 2000 PSI 2500 PSI
3450 2.5 2.3 3.4 4.5 5.7

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • GX2525A Exploded View
  • GX2525A Parts List
  • GX2525A Torque Specifications


Documents open in new window/tab.

  • Pump Assembly Instructions
  • Giant Industries Limited Warranty
  • GX2525A Installation Instructions
  • GX2525A 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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