Skip to Main Content

CAT Pumps 350 Triplex Plunger Pump - 5 GPM, 1500 PSI, 1725 RPM

Mfr. Model #:
KR Part #:
22.40 lbs
Low Stock Warning
Now Only!
Brass manifold triplex plunger pump with stainless steel valves. 1725 RPM, 5 GPM, 1500 PSI.

Technical Specifications

Bore: 20 millimeter
Crankcase Capacity: 18 ounce
Inlet Port: 1/2 inch
Max PSI: 1500
Max Temperature: 160 degrees F
Shaft Diameter: 20 millimeter
Stroke: 12 millimeter
RPM: 1725
Max GPM: 5
Inlet Port: 1/2 inch
Outlet Port: 3/8 inch

Product Description

5 GPM Brass Manifold 5 Frame Plunger Pump

The CAT Pumps 350 model pump is a triplex plunger pump with a 5 gpm maximum flow rate. This five frame plunger pump has 1/2" female NPT inlet ports and 3/8" female NPT outlet ports.

Triple plunger design provides a smooth liquid flow that's perfect for car washes and other high-pressure washing.

Dimensions: 11.73" x 10" x 5.24"


  • 5 GPM
  • 1500 PSI
  • 1725 RPM
  • Inlet Pressure Range: Flooded to 60 PSI
  • .472" (12 mm) stroke
  • .787" (20mm) bore
  • .787" (20mm) shaft diameter
  • 18 oz. crankcase capacity
  • 160° Fahrenheit maximum liquid temperature
  • 1/2" NPTF inlet ports (2)
  • 3/8" NPTF discharge ports (2)
  • Brass manifold
  • Standard Buna-N seals and o-rings
  • Solid ceramic plungers
  • 304 stainless steel valves
  • 19.8 lbs. 

Superior Design:

  • Triplex plunger design gives smoother liquid flow.
  • Hi-Pressure Seals are completely lubricated and cooled by the liquid being pumped.
  • Inlet and discharge valve assemblies interchange for easier maintenance.
  • Lubricated Lo-Pressure Seal provides double protection against external leakage.
  • Oil bath crankcase assures optimum lubrication.
  • Close tolerance concentricity of the ceramic plunger maximizes seal life.
  • Convenient direct drive electric motor options.

Quality Materials:

  • Precision design 304 stainless steel valves and seats are hardened and polished for ultimate seating and extended valve life.
  • Special concentric, high-density, polished, solid ceramic plungers provide a true wear surface and extended seal life.
  • Specially formulated, CAT PUMP exclusive, Hi-Pressure Seals 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 is easily serviced without entering crankcase, requiring less time and effort.
  • Valve assemblies are accessible without disturbing piping, for quick service.
  • Preset packings mean no packing gland adjustment is necessary, reducing maintenance costs

Product Reviews

Frequently Asked Questions