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CAT 3CP1120 Solid Shaft Pressure Washer Pump

SKU: 3CP1120


This 4.2 GPM 2200 PSI direct-drive triplex positive displacement, reciprocating, plunger pump is constructed of a forged brass manifold, 304SS valve assemblies, and solid ceramic plungers.

This is a triplex (three plunger rods) positive displacement, reciprocating, plunger pump, constructed of forged brass manifolds, 304 SS valve assemblies, solid ceramic plungers and standard NBR [Buna-N] seals and o-rings. The 1725 RPM permits multiple drive options including direct drive, flexible coupling, clutch or belt drive.


  • Maximum Volume: 4.2 GPM

  • Maximum Discharge Pressure: 2200 PSI

  • Maximum Inlet Pressure: 100 PSI

  • Maximum Pump Speed: 1725 RPM

  • Standard Liquid Temperature: 160 F (Above 130 F call CAT PUMPS for inlet conditions and elastomer recommendations)
  • Bore Diameter: 18 mm

  • Stroke: 18 mm

  • Shaft Diameter: 12.7 mm

  • Solid Shaft

  • Approximate Weight: 15 lbs.

Please Note: Pump Rails show on image are not included with pump.

Weight 16 lbs
Shaft Diameter

Max Discharge Pressure

Max Pump Speed

Max Inlet Pressure

Bore Diameter


Standard Temperature



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