Best Pressure Washers with a Triplex Pump

Last updated: October 31, 2026

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

  1. Simpson PowerShot 4400 PSI
    #1 of 104.1Full 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
    $899.99
    4,400 PSI4 GPM17,600
  2. Westinghouse WPX3800
    #2 of 104.0Full review

    For big properties and frequent users who want near contractor flow for less than a Honda powered Simpson.

    Amazon $737.63
    $737.63
    3,800 PSI3.6 GPM13,680
  3. Simpson PowerShot 4000 PSI
    #3 of 103.9Full 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
    $829.94
    4,000 PSI3.5 GPM14,000
  4. Westinghouse WPX3600
    #4 of 103.8Full review

    For homeowners who want a longer lasting triplex pump and longer hose without paying Honda engine prices.

    Amazon $529
    $529
    3,600 PSI2.7 GPM9,720
  5. Simpson PowerShot 4200 PSI
    #5 of 103.6Full 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
    $1,199.04
    4,200 PSI4 GPM16,800
  6. Simpson Aluminum 4200 PSI
    #6 of 103.4Full 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
    $1,397
    4,200 PSI4 GPM16,800
  7. Simpson Aluminum 3600 PSI
    #7 of 103.2Full 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
    $701.99
    3,600 PSI2.5 GPM9,000
  8. Simpson PowerShot 3500 PSI
    #8 of 102.8Full 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
    $618
    3,500 PSI2.5 GPM8,750
  9. Simpson PowerShot 3300 PSI
    #9 of 102.8Full 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
    $659
    3,300 PSI2.5 GPM8,250
  10. Simpson Aluminum 3400 PSI
    #10 of 102.7Full 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
    $832.90
    3,400 PSI2.5 GPM8,500