What are the best pressure washers for professional use?

This page compares 4 pressure washers with verified specifications and prices. Top options include DEWALT DXPW61377, DEWALT 4400 PSI 4.0 GPM Gas Pressure Washer with 420cc Engine, Triplex Pump, Commercial Cold Water Power Washer, SIMPSON 4200 PSI 4.0 GPM Gas Pressure Washer with HONDA GX390, 20 in. Surface Cleaner, 100 ft. Hose. Prices range from £717 to £1,661. All data is sourced from manufacturer documentation and specialist retailers.

Product ⇅ Price ⇅ Pounds per Square Inch (psi) ⇅ Gallons Per Minute (gpm) ⇅ Cleaning Units (CU) ⇅ Heating System ⇅ Power Source ⇅ Water Tank Capacity (gallons) ⇅
DEWALT DXPW61377
US 		£716.57 ≈ — — — — Gasoline —

DEWALT DXPW61377 is a cold-water gas pressure washer rated up to 4400 PSI and 4.0 GPM, designed for heavy-duty cleaning. It uses a AAA triplex pump and is powered by a 420cc CRX420 engine. It's suited to professional-grade tasks like driveway and high-traffic area cleaning.

★ Ideal for

For professional use, it combines 4400 PSI and 4.0 GPM output with a AAA triplex pump and a 420cc engine, giving high cleaning performance for demanding jobsites.

Sources:
All Parts Inc CPO Outlets Home Depot
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DEWALT 4400 PSI 4.0 GPM Gas Pressure Washer with 420cc Engine, Triplex Pump, Commercial Cold Water Power Washer
US 		£716.57 ≈ — — — — Gas —

This DEWALT gas pressure washer delivers 4400 PSI and 4.0 GPM with a triplex pump for powerful cleaning. It's built for commercial cold-water use and includes quick-connect nozzle tips plus a long hose for jobsite convenience. Suitable for professional driveway, sidewalk, and heavy-duty exterior cleaning where higher output matters.

★ Ideal for

For professional use, it combines 4400 PSI and 4 GPM with an AAA triplex pump and gas power for consistent high-output cleaning.

Sources:
CPO Outlets The Home Depot Zoro
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SIMPSON 4200 PSI 4.0 GPM Gas Pressure Washer with HONDA GX390, 20 in. Surface Cleaner, 100 ft. Hose
US 		£905.33 ≈ — — — — Gasoline 150

This Simpson gas pressure washer is rated 4200 PSI and 4.0 GPM and is built around a HONDA GX390 engine with a triplex pump for heavy-duty, cold-water cleaning. It comes with a 20 in. surface cleaner and a 100 ft. hose setup for tackling large flat areas more quickly. It suits professional contractors or commercial users needing higher throughput than typical residential units.

★ Ideal for

For professional use, its 4200 PSI and 4.0 GPM flow with a HONDA GX390 engine and triplex pump provide strong cleaning capacity for contract work, and the included 20 in. surface cleaner helps speed up flat-surface jobs.

Sources:
Home Depot
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SIMPSON 4200 PSI 4.0 GPM Gas Pressure Washer, HONDA GX390 Engine, Triplex Pump, Heavy-Duty Cold Water Commercial Power Cleaner
US 		£1661.16 ≈ — — — Cold water Gasoline 150

This SIMPSON 4200 PSI / 4.0 GPM commercial cold-water gas pressure washer is powered by a HONDA GX390 engine and uses a CAT triplex pump for heavy-duty cleaning performance. It's built for professional cleaning jobs such as buildings, docks, and other high-traffic areas, and includes quick-connect nozzle tips for multiple spray patterns. The machine is suited to contractors who need strong pressure with reliable commercial components.

★ Ideal for

For professional use, its 4200 PSI at 4.0 GPM output paired with a HONDA GX390 engine and CAT PUMPS triplex pump makes it a strong match for high-demand commercial cleaning tasks.

Sources:
Spraywell The Home Depot
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