Skip to main content
Featured Image for GP6124-4000

A German-made reciprocating triplex plunger pump.

Spheroidal cast iron crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; stainless plungers with hardened metal coating; aramid packing; stainless steel valves; machined stainless steel manifold.

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
Flow12.8 GPM48.5 L/min
Maximum Discharge Pressure6090 PSI420 bar
Crankshaft Speed800 RPM
Power51.2 HP38.2 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 1-1/4" BSP
Discharge Port Size(2) 3/4" BSP
Plunger Diameter0.95 in.24 mm
Stroke1.89 in.48 mm
Maximum Inlet Pressure29 PSI2 bar
Crankshaft Diameter42 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US1.1 gal 4.2 L
Weight277.7 lbs.126.0 kg
NPSHR25.6 Ft.-head7.8 mWs
Manifold Material AISI 303 Stainless Steel
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic
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 #09872
38A 07721 O-Ring 3
39A 12055 O-Ring 3
39B 07693 Support Ring 3
39C 07354 O-Ring 3
39D 12056 Support Ring 3
42 07685 Support Ring 6
44 06956 Guide Ring 3
45 13049 Grooved Ring 3
46 04786 Hose 1
Valve Assembly Kit – Part #09874
51A 07064-0100 Valve Seat 6
51B 13130 Valve Plate 6
51C 07062-0100 Valve Spring 6
51D 05472 Spacer Pipe 6
51E 05473 Valve Spring Guide 6
56A 07150 O-Ring 9
56B 06266 Support Ring 3
Oil Seal Kit – Part #09870
32 06118 Radial Shaft Seal 3
33A 07721 O-Ring 3
33B 13217 Circlip 3

Horsepower Specifications

RPM GPM 2500 PSI 4000 PSI 5800 PSI 6090 PSI
400 6.4 11.0 17.7 25.6 26.9
500 8.0 13.8 22.1 32.0 33.6
600 9.6 16.6 26.5 38.4 40.3
700 11.2 19.3 30.9 44.8 47.0
800 12.8 22.1 35.3 51.2 53.8

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • GP6124-4000 Exploded View
  • GP6124-4000 Parts List
  • GP6124-4000 Torque Specifications


Documents open in new window/tab.

  • Giant Limited Warranty
  • GP6124-4000 Installation Instruction
  • GP6124-4000 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.

Learn More

Join Our Newsletter

Get the latest updates from Giant Pumps delivered right to your inbox!

Subscribe to the Giant Newsletter

Back to Top