Sun Joe SPX4000 Electric Pressure Washer | 2030 PSI / 1.76 GPM
Our SPX4000 brings 2030 PSI of cleaning power and 1.76 GPM flow to driveways, decks, siding, and vehicles. The 14.5-amp motor drives a Total Stop System that shuts off the pump when you release the trigger, extending motor life and saving energy between tasks.
We built this model with dual 0.9-liter detergent tanks so you can load different soap formulas—one for your car, one for your patio—and switch without refilling. The 20-foot high-pressure hose, 35-foot power cord, and large wheels give you the reach and mobility to tackle big yards without constantly relocating your outlet. Five Quick-Connect spray tips (0°, 15°, 25°, 40°, and soap) snap on in seconds, letting you dial pressure from pinpoint jets to wide soap coverage.
Power, flow & versatility
Dual detergent tanks & soap selector
We designed the SPX4000 with two separate 0.9-liter detergent reservoirs mounted on the unit body. A simple dial lets you choose Tank A or Tank B mid-session, so you can keep heavy-duty degreaser loaded in one side and gentle car wash formula in the other. The soap nozzle draws from whichever tank you select, eliminating the need to drain and refill between different cleaning jobs.
Both tanks are translucent so you can monitor soap levels at a glance. When you’re ready to apply detergent, snap the black soap nozzle onto the wand and the low-pressure flow will pull concentrate from your chosen tank through the venturi system. Switch back to any of the four pressure nozzles to rinse with plain water—the detergent path stays closed during high-pressure operation.
Five Quick-Connect nozzles for every surface
Each SPX4000 ships with five color-coded Quick-Connect tips that push onto the spray wand and lock with a quarter turn. The red 0° nozzle concentrates the full 2030 PSI into a pencil-jet stream for stripping paint or blasting rust from metal. The yellow 15° tip fans the jet slightly for concrete, brick, and stubborn stains on driveways.
The green 25° nozzle covers a wider area at moderate pressure—ideal for wood decks, fences, and vinyl siding. The white 40° tip produces the gentlest fan spray for washing cars, outdoor furniture, and windows without risking surface damage. The black soap nozzle operates at low pressure to apply detergent evenly. Store all five tips in the onboard holder when not in use so they’re always within reach.
Total Stop System & energy efficiency
Our Total Stop System automatically shuts off the pump and motor the instant you release the trigger gun. This on-demand operation prevents the motor from running continuously between cleaning passes, reducing wear on internal components and cutting electricity consumption. When you squeeze the trigger again, the pump resumes instantly at full pressure.
The TSS feature also minimizes heat buildup inside the pump housing during pauses, extending the duty cycle on longer jobs. Because the SPX4000 only draws power when you’re actively spraying, you can leave the unit plugged in and step away for a few minutes without idling the motor. The 14.5-amp draw runs efficiently on any standard 120V household outlet with GFCI protection.
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Questions about the SPX4000
The SPX4000 delivers a maximum of 2030 PSI at 1.76 gallons per minute. This output sits in the medium-duty range, strong enough for concrete driveways, wood decks, vinyl siding, and vehicles, but below the threshold where you risk damaging softer surfaces like painted wood or composite materials when you use the wider-angle nozzles.
No. The SPX4000 is designed for cold water only. Introducing hot water can damage the pump seals, O-rings, and internal components that are not rated for elevated temperatures. Always connect the inlet hose to a standard cold-water spigot and keep water temperature below 104°F to maintain warranty coverage and component longevity.
Each of the two 0.9-liter tanks holds a different cleaning concentrate. A selector dial on the unit lets you choose Tank A or Tank B, and the soap nozzle will draw from whichever reservoir you select. This eliminates the need to drain and refill between different formulas, so you can switch from car wash to heavy-duty degreaser mid-session with a simple turn of the dial.
You can safely clean concrete driveways and walkways, asphalt, brick, stone pavers, wood and composite decks, vinyl and aluminum siding, fences, patio furniture, grills, and vehicles. Always start with the widest-angle nozzle (40°) on delicate surfaces like car paint or soft wood, then move to narrower tips only if needed. Avoid the 0° red nozzle on anything you don't want to strip or gouge.
No. The SPX4000 is an electric pressure washer with a sealed 14.5-amp motor, so there is no gas engine, no oil to change, and no spark plugs or air filters to service. Routine maintenance is limited to flushing the detergent system with clean water after each use, inspecting hose connections for leaks, and clearing any debris from the inlet filter screen.
The high-pressure hose measures 20 feet from the pump outlet to the spray gun, and the power cord is 35 feet with an inline GFCI plug. Combined, this gives you a 55-foot working radius from your electrical outlet, enough to reach around most single-family homes or across a two-car driveway without repositioning the unit or adding extension cords.
The Total Stop System automatically shuts off the pump and motor the moment you release the trigger gun, then restarts instantly when you squeeze again. This on-demand operation reduces wear on the motor, prevents heat buildup during pauses, and cuts electricity consumption between cleaning passes. It also extends the overall duty cycle by giving internal components brief rest periods during longer jobs.