An American-made triplex plunger positive displacement pump with reciprocating plungers for direct or belt drive applications.

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), couplers (Aluminum or Delrin), unloader/regulator, fixed or adjustable chemical injector, thermal relief valve 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 www.P65Warnings.ca.gov

  • P228 Exploded View
  • P228 Parts List
  • P228 Torque Specifications
  • P228 Technical Drawing

Sorry, there are no accessories associated with this product.

  • Giant Industries Limited Warranty
  • P228 Installation Instructions
  • P228 Repair Instructions
  • Troubleshooting Guide


U.S. Metric
1750 RPM
Flow 1.8 GPM 6.8 L/min
Pressure (Continuous) 2000 PSI 140 bar
Pressure (Intermittent) 3000 PSI 200 bar
3450 RPM
Flow 3.3 GPM 12.7 L/min
Pressure (Continuous) 2000 PSI 140 bar
Pressure (Intermittent) 3000 PSI 200 bar
Common Specifications
Maximum Inlet Pressure 145 PSI 10 bar
Plunger Diameter 0.63″ 16 mm
Stroke 0.28″ 7.0 mm
Max. Temperature of Pumped Fluids 160 °F 70 °C
Inlet Ports (2) 1/2″ BSP
Discharge Ports (2 ) 3/8″ BSP
Shaft Rotation Top of Pulley Towards Manifold
Crankshaft Diameter 0.98″ 24 mm
Key Width 0.31″ 8 mm
Shaft Mounting Either Side
Weight 11.7 lbs. 5.3 kg
Crankcase Oil Capacity 7.5 fl. oz. 0.22 L
Extended Crankcase Oil Capacity 9.0 fl. oz. 0.27 L
Volumetric Efficiency @ 1750 RPM 0.94
Volumetric Efficiency @ 3450 RPM 0.87
Volumetric Efficiency @ 1750 RPM 0.86
Key Component Material
Manifold Special Brass
Plungers Solid Ceramic Oxide
Valves High Grade Stainless Steel
Seals Nitrile With Fabric Reinforcing
Gear End Aluminum

Click the image to enlarge


RPM GPM 1000PSI 1500PSI 2000PSI 2500PSI
500 0 0 0 0 0
1000 0 0 0 0 0
1750 0 0 0 0 0
3000 0 0 0 0 0
3200 0 0 0 0 0
3450 0 0 0 0 0

Horsepower Requirements

The ratings shown are the power requirements for the pump. Gas engine power outputs must be approximately twice the pump power requirements shown above.

We recommend a 1.15 service factor be specified when selecting an electric motor as the power source. To compute specific pump horsepower requirements use the following formulas:
Electric HP = (GPM X PSI)/1450
Gas HP = (GPM X PSI)/1100

*Engine power varies based on horizontal or vertical orientation, as well as by makes and models from each manufacturer.


Plunger Packing Kit – Part #09525
23 06315 V-Sleeve 6
24 06290 Pressure Ring 3
Valve Assembly Kit – Part #09116
32x 07946A Valve Assembly Complete 6
31 07853 O-Ring 6
33 07913 O-Ring 6
Oil Seal Kit – Part #09144
19 08356-00010 Oil Seal 3

Repair Kits Available

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.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.