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Pressure-Pro Cat Pumps 3500 PSI 4.5 GPM Solid Shaft Plunger Pump

CAT Pumps Model 45 is a 4.5 GPM @ 3500 PSI and one of many that are used in a wide variety of cleaning and washing applications, including self-serve car washes and pressure washing. Specially formulated with V-packings that offer unmatched performance!
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The CAT Pumps 45 model is a triplex type plunger pump with a 304 stainless steel housing, solid ceramic plungers, and a forged brass manifold that is strong and corrosion-resistant. CAT triplex pumps are precisely engineered and designed for smoother liquid flow, extended life, and unmatched durability -even at high pressure levels.

This triplex model includes 1/2" female NPT inlet ports and 3/8" female NPT outlet ports. Use this strong, lightweight, high-efficiency triplex pump for car wash systems, desalination, chemical injection, and more!


  • 4.5 GPM maximum flow rate
  • 3500 PSI maximum pressure rating
  • 1645 RPM maximum pump speed
  • 160° Fahrenheit maximum liquid temperature
  • Bore: .630" (16 millimeter)
  • Stroke: .708" (18 millimeter)
  • Crankcase Capacity: 18 oz.
  • 1/2" NPTF inlet ports (2)
  • 3/8" NPTF discharge ports (2)


  • 11.99" X 8.54" X 5.5"


Superior Design:

  • Triplex plunger design gives smoother liquid flow.
  • V-Packings are completely lubricated and cooled by the liquid being pumped.
  • Lubricated Lo-Pressure seals provide double protection against external leakage.
  • Oil bath crankcase assures optimum lubrication.
  • Close tolerance concentricity of the ceramic plunger maximizes seal life.

Quality Materials:

  • Precision design 304 stainless steel valves and seats are hardened and polished for ultimate seating and
  • extended valve life.
  • Forged brass manifold for strength and corrosion resistance.
  • Special concentric, high-density, polished, solid ceramic plungers provide a true wear surface and
  • extended seal life.
  • Specially formulated, CAT PUMP exclusive, V-Packings offer unmatched performance and seal life.
  • Die cast aluminum crankcase provides high strength, minimum weight and precision tolerance control.
  • Chrome-moly crankshaft gives unmatched strength and surface hardness.
  • Oversized crankshaft bearings with greater loading capacity means longer bearing life.

Easy Maintenance:

  • Wet-end easily serviced without entering crankcase.
  • Valve assemblies are accessible without disturbing piping.
  • Interchangeable inlet and discharge valve assemblies.
  • Preset seals require no packing adjustment.

Triplex Plunger Pump Applications:

  • Car Washes
  • Hydrostatic Pressure Testing
  • Desalination
  • Chemical Injection
  • Industrial Machine Part Cooling
  • Fire Suppression

NOTE: Brackets not included

Assembled in the USA


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