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Hi ph. Thank you for your question! This Greenworks pressure washer is equipped with a brushless motor that automatically adjusts the water flow rate based on the nozzle in use. Here’s how the performance breaks down: GPM (Gallons Per Minute) refers to the unit’s maximum water flow. The maximum flow rate is 2.3 GPM at 100 PSI, typically achieved when using the soap nozzle. The maximum pressure is 3000 PSI at 1.2 GPM, which is reached when using a high-pressure nozzle (such as the 0° nozzle). To clarify: 3000 PSI is the highest pressure offered by this unit. Under this setting, the flow rate is approximately 1.1–1.2 GPM. Conversely, the unit delivers a higher GPM at lower pressure when using the soap nozzle. We hope this explanation helps!
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