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5CP2120W Cat Pump 4 GPM, 2500 PSI, 6.9 HP

Mfr. Model #:
KR Part #:
20.60 lbs
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One of the most popular pumps for self-service car wash bays! This is a triplex positive displacement, reciprocating, plunger pump. Features include W770 manifold, 304 stainless valve assemblies, solid ceramic plungers, and standard NBR (Buna-N) seals and o-rings.

Technical Specifications

Horsepower: 6.9
Max GPM: 4
Max PSI: 2500
Min PSI: 100
RPM: 950
Inlet Port: 1/2 inch
Bore: 20 millimeter
Shaft Diameter: 20 millimeter
Stroke: 18 millimeter
Max Temperature: 160 degrees F
Crankcase Capacity: 17 ounce

Product Description

CAT 5CP2120W Plunger Pump

This CAT Pump 5CP2120W pressure washing pump features concentric, high-density, polished, solid ceramic plungers for longevity and extended seal life. The manifold is made of a high tensile strength W770 alloy for continuous duty. The 100% wet seal design lets pumped liquids cool and lubricate on both sides. In addition, stainless steel valves, seats, and springs provide corrosion-resistance for a long life. 

CAT Pumps have exclusive low-pressure and hi-pressure seals for unbeatable performance. Plus, the press-in style seal case offers excellent alignment, support, and tool-free servicing.

CAT Pumps pressure washing pumps are known as the pumps with nine lives because of their dependability. This triplex plunger pump is designed to deliver smooth, low pulsation flows at a variety of pressures and flow rates.

Don't miss our Tom's Way video under the Videos tab to watch Tom repair this pump.

This pump is also available in high temperature models: 5CP2120W.3400 and 5CP2120W.3.

Front View of the 5CP2120W Pump

Pressure Washer Pump Reviews: Customer Harry A. who purchased this car wash pump claims, "This is a great pump [and he] would definitely buy more."

Pump Dimensions: 10.35 x 10.0 x 5.78" (263 x 254 x 147 mm)

Pump Features:

  • Triplex (three plunger rods) design for high efficiency and low pulsation
  • Standard NBR (Buna-N) seals and o-rings
  • Oil-bath crankcase
  • Heat treated valves and seals
  • Solid ceramic plungers
  • Exclusive high-pressure seal design
  • Wet ends can be serviced without entering the crankcase
  • High-pressure seals are lubricated and cooled by the solution being pumped
  • Pre-set low-pressure seals provide secondary protection against external leaks

Side View of the 5CP2120W Pump

Pump Applications:

  • Car wash and truck wash
  • Continuous duty, high-pressure washing applications
  • Industrial cleaning, pressure washing, reverse osmosis, water misting, and more

Pump Specs:

  • Inlet Pressure Range: (950 RPM) - 5 to 60 PSI (- 0.35 to 4 BAR)
  • 4 GPM
  • 2500 PSI
  • Rated to 160 degrees Fahrenheit
  • Belt drive
  • Solid shaft

Pump replacement parts:

  • 7003 pressure regulator
  • 7850 modular pressure unloader
  • 33962 pop-off valve
  • 6089 pressure gauge
  • 6029 pulsation dampener
  • 7104.4 inlet filter
  • 34334 oil drain kit

Product Reviews

Frequently Asked Questions

Question:I have a cat pump, 5CP2120w. I need a rail instal kit, the part that would go over the 20 mil shaft and the key, can u help me with that? - Mike (01/22/2021)
Response:Yes, please contact our sales department for item numbers and pricing, 800-233-3873
Question:Belt driven Application, what horsepower motor is recommended for this pump? - Matthew (01/05/2021)
Response:5HP is recommended.
Question:Do you offer a mounting kit for the 5CP2120W pump that includes rails, hardware, and shaft cover? - Tom (08/30/2020)
Response:No, they must be ordered separate.
Question:What are those part numbers? - Tom (08/31/2020)
Response:PU30611 & PU118672