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Cat Pumps Fully Plumbed 66DX40GG1 Pressure Washer Triplex Pump, 4000 PSI, 4.0 GPM | Summary
The Cat Pumps 66DX40GG1 is a fully-plumbed triplex pressure washer pump system engineered for high-performance, commercial-grade cleaning. Producing 4.0 GPM at 4000 PSI, this direct drive triplex plunger pump is paired with a powerful gas engine mounting flange and comes pre-assembled with all the necessary plumbing to get you up and running fast.
Whether you're replacing a worn-out pump or building a custom pressure washer rig, the 66DX40GG1 is trusted by professionals for its legendary Cat Pumps durability, low maintenance needs, and long life in demanding environments. With its compact, fully-plumbed design, this pump simplifies installation and maximizes reliability on the job.
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Fully Plumbed Assembly: Comes pre-installed with unloader, thermal relief valve, chemical injector setup, and garden hose inlet fitting.
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4000 PSI at 4.0 GPM: Ideal for high-demand commercial cleaning applications requiring powerful water flow and pressure.
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Triplex Plunger Pump: Industrial-grade design with stainless steel plungers for long-lasting, consistent performance.
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Direct Drive Configuration: Easily mounts to most 1" shaft gas engines including Honda GX Series and similar.
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Cat Pumps Reliability: Known for extreme durability, smooth operation, and low-maintenance longevity.
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Thermal Protection: Built-in thermal relief valve helps prevent overheating during extended use.
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Compact Design: Space-saving layout perfect for pressure washer frames and mobile setups.
| Specification | Details |
| Brand | Cat Pumps |
| Part Number | 66DX40GG1 |
| Flow Rate | 4.0 GPM |
| Max Pressure | 4000 PSI |
| RPM | 3400 RPM |
| Pump Type | Triplex Plunger |
| Drive Type | Direct Drive |
| Engine Mount | 1" Shaft Gas Engine Flange |
| Inlet | Garden Hose Fitting (standard) |
| Outlet | 3/8" |
| Unloader | Included |
| Downstream Chemical Injector | Included |
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