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CAT Pumps 3545 Triplex Plunger Pump, 45 GPM, 1000 PSI

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139.00 lbs
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The most popular pumps for self-service bays, multi-gun and multi-nozzle systems, and industrial high pressure use! 35 Frame forged brass model plunger pump is dependable and long-lasting. Brackets not included.
Freight Only

Freight Only


Technical Specifications

RPM: 765
Stroke: 48 millimeter
Shaft Diameter: 35 millimeter
Max Temperature: 140 degrees F
Max PSI: 1000
Max GPM: 45
Inlet Port: 1 1/2 inch
Crankcase Capacity: 4.2 quart
Bore: 45 millimeter

Product Description

CAT Pump 45 GPM, 1000 PSI

The most popular pumps for self-service bays, the CAT Pumps 3545 is a triplex plunger pump designed to deliver smooth, low pulsation flows at a wide variety of pressures and flow rates. Perfect for use in continuous duty, high pressure applications including Car/Truck Wash, Industrial Cleaning, Pressure Washing, Reverse Osmosis, Water Misting and more. Exclusive high pressure seal design means seals are lubricated and cooled by the solution being pumped.

Dimensions: 19.11" x 15.04" x 7.8"  

Standard Features:

  • Triplex Plunger design provides smoother liquid flow.
  • V-Packings are completely lubricated and cooled by the liquid being pumped.
  • Special flushed inlet manifold permits an external flush liquid providing cooling for hi-temp liquids and lubrication for low lubricity liquids.
  • Lubricated Lo-Pressure Seals provide double protection against external leakage. 
  • Oil bath crankcase assures optimum lubrication.
  • Close tolerance concentricity of the ceramic plunger offers perfect alignment and maximizes seal life.
  • Precision design 304 and 316 stainless steel valves and seats are hardened and polished for ultimate seating and extended valve life.
  • Forged brass, 316 stainless steel, duplex stainless steel or nickel aluminum bronze manifolds 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 offers 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 crankcase.
  • Valve assemblies are accessible without disturbing piping, for quick service.
  • Preset seals require no packing adjustment.


  • Maximum Flow: 45 GPM
  • Maximum Pressure: 1000 PSI
  • Maximum Temperature: 140° F
  • RPM: 765
  • Inlet Port: 1.5" NPT-F
  • Outlet Port: 1" NPT-F

Product Reviews

Frequently Asked Questions

Question:RPM for 45 GPM is 765, What is RPM for 30 GPM ? What HP and RPM is needed to reach 500 psi and what would GPM be? - Larry (08/29/2021)
Response:RPM for 30 GPM would be 510 RPM. GPM at 500 PSI would be just slightly below that, but not significantly. HP requirement is variable - please see document 3545_H under "Manuals" for calculations.