Washers with a serviceable triplex plunger pump, the kind that lasts for years of regular use.
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Best Pressure Washers with a Triplex Pump: Gas
- Simpson PowerShot 4400 PSI#1 of 10Full review
The best value contractor washer here: 4400 PSI at 4 GPM with pro pump coverage for less than the Honda powered models. Too much machine for occasional home use.
Amazon $899.99$899.994,400 PSI4 GPM17,600 - Westinghouse WPX3800#2 of 10Full review
For big properties and frequent users who want near contractor flow for less than a Honda powered Simpson.
Amazon $737.63$737.633,800 PSI3.6 GPM13,680 - Simpson PowerShot 4000 PSI#3 of 10Full review
A contractor grade washer for people who clean large areas often. Its flow and hose make big jobs much quicker than a homeowner unit.
Amazon $829.94$829.944,000 PSI3.5 GPM14,000 - Westinghouse WPX3600#4 of 10Full review
For homeowners who want a longer lasting triplex pump and longer hose without paying Honda engine prices.
Amazon $529$5293,600 PSI2.7 GPM9,720 - Simpson PowerShot 4200 PSI#5 of 10Full review
For pressure washing businesses and farms that run a washer for hours at a time. Homeowners get far better value from a 3,000 to 3,600 PSI model.
Amazon $1,199.04$1,199.044,200 PSI4 GPM16,800 - Simpson Aluminum 4200 PSI#6 of 10Full review
For pressure washing businesses that want a CAT pump and a rustproof frame at full 4 GPM flow. The steel frame PS4240 does the same work for less.
Amazon $1,397$1,3974,200 PSI4 GPM16,800 - Simpson Aluminum 3600 PSI#7 of 10Full review
A light, corrosion resistant Honda and triplex washer for small contractors and serious homeowners. It costs less than the CAT pump ALH3228 with more pressure and a longer hose.
Amazon $701.99$701.993,600 PSI2.5 GPM9,000 - Simpson PowerShot 3500 PSI#8 of 10Full review
A Honda powered washer for frequent home use at a lower price than the PS3228. Buyers who want the 5 year triplex pump coverage should pick the PS3228.
Amazon $618$6183,500 PSI2.5 GPM8,750 - Simpson PowerShot 3300 PSI#9 of 10Full review
For homeowners and small contractors who will run a washer for many hours a year. You pay for the Honda engine and triplex pump, not for more cleaning power.
Amazon $659$6593,300 PSI2.5 GPM8,250 - Simpson Aluminum 3400 PSI#10 of 10Full review
For contractors who want a CAT pump and a rustproof frame on a light 2.5 GPM machine. Homeowners get the same cleaning power for far less elsewhere.
Amazon $832.90$832.903,400 PSI2.5 GPM8,500