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CAT Pumps 56G1 Brass Manifold 8 GPM 7 Frame Plunger Pump with Gearbox - 2500 PSI

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40.00 lbs
Usually Ships in 2 Weeks
Now Only!
Seven frame plunger pump with gearbox included. 1/2" x 3/8" F ports. Max 8 GPM and 2500 PSI. Rails sold separately.

Technical Specifications

Bore: 18 millimeter
Crankcase Capacity: 25 ounce
Inlet Port: 1/2 inch
Max GPM: 8
Max PSI: 2500
Max Temperature: 160 degrees F
RPM: 1760
Shaft Diameter: 24 millimeter
Stroke: 24 millimeter

Product Description

Triplex Plunger Pump with Gearbox Accessory

This CAT Pumps 56G1 model pump is rated for a flow up to 8 gpm at 2500 PSI pressure. The model 56G1 brass pump 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!

The 56G1 CAT model is a triplex type plunger pump with a 304 stainless steel housing, ceramic solid plungers, and a brass forged 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 version of the CAT 56 model pump includes a gearbox part installed.


  • 8 GPM flow rate
  • 2500 PSI maximum pressure
  • 100-2500 PSI pressure range
  • 24mm stroke (.945")
  • 24mm shaft (.945")
  • 18mm bore (.708)
  • 25 oz. crankcase capacity
  • 1760 RPM (Engine RPM: 3600)
  • 1/2" NPT-F inlet port
  • 3/8" NPT-F outlet port
  • 160° F maximum liquid temperature
  • 7 frame style
  • Flooded to 60 PSI inlet pressure range


  • 13.93" x 8.2" x 6.41"


Superior Design:

  • Triplex plunger design provides 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 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 & extended valve life.
  • Brass manifold is strong and corrosion resistant.
  • Special concentric, high-density, polished, solid ceramic plungers provide a true wear surface and extended seal life.
  • Specially formulated, Hi-Pressure Seals offer unmatched performance & seal life.
  • Die cast aluminum crankcase provides high strength, minimum weight and precision tolerance control.
  • Chrome crankshaft gives unmatched strength and surface hardness.
  • Oversized crankshaft bearings with greater capacity mean longer bearing life.

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