
Pressure Washer Pump (EZ4040G)
$399.00
Why Choose the EZ4040G?
Because when you need serious pressure in a compact build, the EZ4040G delivers power, durability, and efficiency. It installs easily, performs consistently, and withstands demanding use across job sites. Whether you’re upgrading your rig or replacing a worn pump, this model gives you everything you need—right out of the box.
Choose General Pump EZ Series—where performance meets reliability.
General Pump EZ4040G – EZ Series Triplex Plunger Pump, 4.0 GPM, 4000 PSI, 1″ Hollow Shaft, Flanged for Gas Engine Mounting
The General Pump EZ4040G from the EZ Series is a high-performance, compact solution built for demanding pressure washing systems. It delivers a powerful 4.0 GPM at 4000 PSI, making it ideal for heavy-duty cleaning on commercial or industrial equipment.
Designed with a 1″ hollow shaft, this pump is flanged for direct coupling to gasoline engines using the SAE J609B bolt pattern. As a result, installation is quick, secure, and compatible with most common engine frames. The pump runs efficiently at 3400 RPM, providing consistent output while minimizing vibration.
Its .512-inch bore and stroke work in harmony to maximize water displacement and pressure delivery. Furthermore, it only requires 16.4 GHP, giving you impressive performance without overloading your engine.
Even with its compact size and 20-pound frame, the EZ4040G is built to handle harsh environments. It features a triplex plunger design with solid ceramic plungers and stainless steel components, ensuring long life and low maintenance.
Backed by a 5-year limited warranty, this pump is trusted by professionals who expect lasting power and consistent results.
Key Features:
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Flow Rate: 4.0 GPM
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Max Pressure: 4000 PSI
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RPM: 3400 for high-output performance
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Shaft: 1″ hollow for direct gas engine mount
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Flange Type: SAE J609B
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Bore and Stroke: 0.512″ (13 mm)
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Horsepower Required: 16.4 GHP
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Weight: 20.0 lbs.
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Warranty: 5-year limited
General Pump delivers dependable pumps and accessories for a wide range of industries across the U.S. and beyond. We combine engineering, advanced technology, and product expertise with a strong focus on customer service. Our motto, “We Will Find a Way,” reflects our commitment to providing solutions that help you get the job done.
With over 110,000 square feet of facilities and 60+ team members in Minnesota and China, we support more than 40 countries. Our Minnesota headquarters unites design, engineering, manufacturing, and distribution under one roof for maximum efficiency.

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