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CAT Pumps 3CP1120G Triplex Plunger Pump with Gearbox - 3.5 GPM, 2200 PSI, 1420 RPM

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21.41 lbs
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Belt-drive triplex plunger pump with brass manifold, stainless steel valves, and Buna seals. 3.5 GPM, 1420 RPM, 2200 PSI. NOTE: Brackets not included.

Technical Specifications

Bore: 18 millimeter
Crankcase Capacity: 12 ounce
Inlet Port: 1/2 inch
Max GPM: 3.5
Max PSI: 2200
Max Temperature: 160 degrees F
RPM: 1420
Shaft Diameter: 16.5 millimeter
Stroke: 12.7 millimeter

Product Description

3.5 GPM Triple Plunger Pump with Attached Gearbox

The CAT Pumps 3CP1120G pump is a positive displacement, reciprocating, three plunger rod pump. It is has a brass manifold, 304 stainless steel valve assemblies, solid ceramic plungers, and standard NBR (Buna-N) seals and o-rings. This model includes a gearbox for direct mounting to a gas engine drive.

Designed for belt-driven applications, this high-pressure triplex pump is durable and reliable enough for commercial applications like car washes and pressure washing businesses. 3.5 GPM flow rate, 2200 maximum PSI, and 1420 maximum RPM.

Dimensions: 9.1" x 8.78" x 5.47"


  • 3.5 GPM maximum flow rate
  • 100-2200 PSI pressure range
  • 1420 RPM
  • 1/2" NPTF inlet ports (2)
  • 3/8" NPTF discharge ports (2)
  • Either side pulley mounting
  • 12 ounce crankcase capacity
  • 160 degrees Fahrenheit standard liquid temperature
  • .50" (12.7 mm) stroke
  • .65" (16.5 mm) shaft diameter
  • .709" (18 mm) bore
  • Brass manifold
  • 304 stainless steel valves
  • Buna-N seals and O-rings
  • Gearbox included


  • Triplex design offers high-efficiency and low pulsation.
  • Durable high-pressure seals are lubricated and cooled by pumped liquid.
  • Pre-set Lo-Pressure seals provide secondary protection against external leaks and require no packing adjustment.
  • Special high-density, polished, concentric plungers provide a true wear surface and extended seal life.
  • Specially formulated seals offer unmatched performance and extended life.
  • Convenient press-in style seal case and interchangeable inlet and outlet valves for easy servicing.
  • Wet-end easily serviced without entering crankcase.

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