Skip to Main Content

Cat Pumps 45 Triplex Plunger Pump - 4.5 GPM, 3500 PSI, 1645 RPM

Mfr. Model #:
KR Part #:
21.00 lbs
Out of Stock - Pre-Order Now
Now Only!

The CAT Pump 45 is a triplex plunger pump that features specially formulated V-packings that offer unmatched performance and seal life! It produces a maximum flow rate of 4.5 GPM. Plus, it handles 3500 PSI.


Technical Specifications

Bore: 16 millimeter
Crankcase Capacity: 18 ounce
Inlet Port: 1/2 inch
Max GPM: 4.5
Max PSI: 3500
Max Temperature: 160 degrees F
RPM: 1645
Shaft Diameter: 20 millimeter
Stroke: 18 millimeter

Product Description

4.5 GPM Triplex Pump

CAT Pumps model 45 is a triplex 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 higher pressures.

This triplex model includes 1/2" female NPT inlet ports and 3/8" female NPT outlet ports. CAT Pump 45 is a strong, lightweight, high-efficiency triplex pump that is perfect 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 mean longer bearing life.

Easy Maintenance:

  • Wet-end easily serviced without entering the 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

Other Versions of this Pump Model:

Product Reviews

Frequently Asked Questions