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Best Triplex-Pump Gas Pressure Washers (2026)

Gas washers whose makers list a triplex pump.

Updated 2026-11-124 picksFull gas pressure washers ranking

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  1. 1
    Most power

    Westinghouse WPX4400

    Score is within our gas pressure washers ranking
    9.5/10

    4,400 PSI, 4.2 GPM, 50 ft hose.

    What we like

    • Top pressure in this comparison (4400 PSI)
    • Top flow in this comparison (4.2 GPM)
    • Top cleaning units (computed) in this comparison (18480 CU)
    • Top high-pressure hose length in this comparison (50 ft)

    Watch out for

    • Highest weight in this comparison (142 lb)
    Check price at AmazonFull specs & sources
  2. 2
    High flow

    Westinghouse WPX3800

    Score is within our gas pressure washers ranking
    6.6/10

    3,800 PSI at 3.6 GPM.

    What we like

      Watch out for

        Check price at AmazonFull specs & sources
      • 3
        Lighter triplex

        Westinghouse WPX3600

        Score is within our gas pressure washers ranking
        4.7/10

        3,600 PSI at 79 lb.

        What we like

          Watch out for

            Check price at AmazonFull specs & sources
          • 4
            CARB compliant

            Champion PRO 3500 PSI Pressure Washer (100787)

            Score is within our gas pressure washers ranking
            4.6/10

            Honda engine, 50 ft hose.

            What we like

            • Top high-pressure hose length in this comparison (50 ft)

            Watch out for

              Check price at AmazonFull specs & sources

            What to look for

            Change pump oil

            Triplex pumps have serviceable oil; follow the maker's schedule.

            Keep comparing

            Full rankingBest Gas Pressure Washers: Westinghouse, Champion & WEN (2026) Head-to-headWestinghouse WPX4400 vs Westinghouse WPX3800Head-to-headWestinghouse WPX3600 vs Champion PRO 3500 PSI Pressure Washer (100787)Head-to-headWestinghouse WPX4400 vs Westinghouse WPX3600Head-to-headWestinghouse WPX3800 vs Westinghouse WPX3600 TopicPressure Washers