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Updated November 2026 · 7,000+ Cleaning Units · Concrete & Driveway Stripping

Best Gas Pressure Washers of 2026: Homeowner Axial vs. Pro Triplex Compared

Verdict

When 120V electric washers are too slow for a stained two-car driveway, brick retaining walls, or second-story siding, a 3,100–3,300 PSI × 2.3–2.5 GPM gas machine delivers over 7,000 Cleaning Units.

Jump to:Best 3,100–3,300 PSI Gas Pressure WashersBest 15-Inch Steel Rotary Surface CleanerCompare tableQuestions

Our winners at a glance

SIMPSON Cleaning MegaShot MS61222-S Gas Pressure Washer — 3100 PSI, 2.3 GPM, CRX165 Engine
Driveways, Sidewalks & Heavy Concrete GrimeSIMPSON Cleaning MegaShot MS61222-S Gas Pressure Washer — 3100 PSI, 2.3 GPM, CRX165 EngineHomeowner Gas Pressure Washer · Premium
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SIMPSON PowerShot PS3228 Commercial Gas Pressure Washer — 3300 PSI, 2.5 GPM, Honda GX200 + AAA Triplex
Contractors, Paint Prep & Long-Run DurabilitySIMPSON PowerShot PS3228 Commercial Gas Pressure Washer — 3300 PSI, 2.5 GPM, Honda GX200 + AAA TriplexCommercial Triplex Gas Washer · Flagship
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SIMPSON Cleaning 80165 15-Inch Universal Steel Surface Cleaner Attachment (2200–3700 PSI)
Cutting Driveway Cleaning Time by 50% (No Zebra Stripes)SIMPSON Cleaning 80165 15-Inch Universal Steel Surface Cleaner Attachment (2200–3700 PSI)15-Inch Rotary Driveway Scrubber · Mid-Range
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Compare the top picks

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PickBest forPSI · GPM · Cleaning UnitsMotor / Engine & PumpHose, Nozzles & FrameWeight & Power SourceListing
PremiumSIMPSON CleaningMegaShot MS61222-S (3100 PSI)
Driveways, Sidewalks & Heavy Concrete Grime3,100 PSI · 2.3 GPMCRX165 residential engine · OEM Technologies axial cam pump w/ thermal relief25 ft MorFlex 1/4" hose · 4 QC tips (0°, 15°, 40°, soap) · 16" steel wand54 lbs · Unleaded gasoline · 12" never-flat wheelsCheck price on Amazon
FlagshipSIMPSON CleaningPowerShot PS3228 (GX200)
Contractors, Paint Prep & Long-Run Durability3,300 PSI · 2.5 GPM · 8,250 CUHonda GX200 engine w/ low-oil shutdown · AAA triplex plunger pump25 ft MorFlex hose · 5 QC tips (0°, 15°, 25°, 40°, soap) · Welded steel frame74.8 lbs · Unleaded gasoline · 10" pneumatic tiresCheck price on Amazon
Mid-RangeSIMPSON Cleaning15" Steel Surface Cleaner
Cutting Driveway Cleaning Time by 50% (No Zebra Stripes)Rated for 2,200–3,700 PSI washers (2.3–3.4 GPM)Two rotating high-pressure jets · Stainless nozzles15 in. powder-coated steel shroud5.5 lbs · Universal 1/4-inch QC plugCheck price on Amazon

Specs as each seller lists them. Prices and availability are shown on Amazon. What the specs mean.

Group 1 · Homeowner & Pro Gas Machines

Best 3,100–3,300 PSI Gas Pressure Washers

Welded steel frames, 10-inch pneumatic tires, and 2.5 GPM water volume.

SIMPSON Cleaning MegaShot MS61222-S Gas Pressure Washer — 3100 PSI, 2.3 GPM, CRX165 EngineTop pick in group#1
SIMPSON CleaningPremiumBest for: Driveways, Sidewalks & Heavy Concrete Grime

SIMPSON Cleaning MegaShot MS61222-S Gas Pressure Washer — 3100 PSI, 2.3 GPM, CRX165 Engine

Delivers 3,100 PSI at 2.3 GPM from a CRX165 residential engine and a maintenance-free OEM Technologies axial cam pump with thermal relief, on a welded, powder-coated steel frame with 12-inch never-flat wheels.

PSI · GPM · Cleaning Units3,100 PSI · 2.3 GPM
Motor / Engine & PumpCRX165 residential engine · OEM Technologies axial cam pump w/ thermal relief
Hose, Nozzles & Frame25 ft MorFlex 1/4" hose · 4 QC tips (0°, 15°, 40°, soap) · 16" steel wand
Weight & Power Source54 lbs · Unleaded gasoline · 12" never-flat wheels
Watch out for: Requires gas/oil maintenance and winterizing before freezing temperatures; 49-state compliant.
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SIMPSON PowerShot PS3228 Commercial Gas Pressure Washer — 3300 PSI, 2.5 GPM, Honda GX200 + AAA Triplex#2
SIMPSON CleaningFlagshipBest for: Contractors, Paint Prep & Long-Run Durability

SIMPSON PowerShot PS3228 Commercial Gas Pressure Washer — 3300 PSI, 2.5 GPM, Honda GX200 + AAA Triplex

Pairs the Honda GX200 engine (with low-oil shutdown) and a AAA triplex plunger pump with an integrated unloader and thermal relief, designed for a long service life.

PSI · GPM · Cleaning Units3,300 PSI · 2.5 GPM · 8,250 CU
Motor / Engine & PumpHonda GX200 engine w/ low-oil shutdown · AAA triplex plunger pump
Hose, Nozzles & Frame25 ft MorFlex hose · 5 QC tips (0°, 15°, 25°, 40°, soap) · Welded steel frame
Weight & Power Source74.8 lbs · Unleaded gasoline · 10" pneumatic tires
Watch out for: Overkill and heavy (about 75 lbs) if you only wash your car and small patio twice a year.
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Group 2 · Essential Gas Driveway Companion

Best 15-Inch Steel Rotary Surface Cleaner

Pair your 3,100+ PSI gas washer with a 15-inch dual-jet steel shroud; Simpson says it cuts cleaning time by 50%.

SIMPSON Cleaning 80165 15-Inch Universal Steel Surface Cleaner Attachment (2200–3700 PSI)Top pick in group#3
SIMPSON CleaningMid-RangeBest for: Cutting Driveway Cleaning Time by 50% (No Zebra Stripes)

SIMPSON Cleaning 80165 15-Inch Universal Steel Surface Cleaner Attachment (2200–3700 PSI)

Snaps onto any 1/4-inch quick-connect wand and spins two high-pressure jets under a 15-inch powder-coated steel shroud to clean wide concrete paths without wand streaks; rated for 2,200–3,700 PSI washers.

PSI · GPM · Cleaning UnitsRated for 2,200–3,700 PSI washers (2.3–3.4 GPM)
Motor / Engine & PumpTwo rotating high-pressure jets · Stainless nozzles
Hose, Nozzles & Frame15 in. powder-coated steel shroud
Weight & Power Source5.5 lbs · Universal 1/4-inch QC plug
Watch out for: Requires at least 2,200 PSI and 2.3 GPM—1,700 PSI electric washers fall below the listed minimum.
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MegaShot (Axial) vs. PowerShot (Triplex): Which Gas Washer Fits You?

Choose based on annual runtime hours and whether you need pressure adjustment.

  1. 01
    Under 40 Hours/Year → SIMPSON MegaShot MS61222-S
    Maintenance-free axial cam pump with 3,100 PSI × 2.3 GPM (7,130 CU) handles seasonal driveway, fence, and patio jobs.
  2. 02
    Contractors & Large Estates → SIMPSON PowerShot PS3228
    Upgrades to a commercial Honda GX200 engine, AAA triplex plunger pump with integrated unloader, and a 25-foot MorFlex hose.
  3. 03
    Add the 15" Steel Surface Cleaner for Concrete
    Eliminates streaky wand marks and cuts driveway cleaning time in half.
  4. 04
    Never Let a Gas Washer Idle Without Pulling the Trigger
    Water flowing through the pump cools it—never leave a gas engine running for more than 2 minutes without spraying.
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Questions

Why can't I let a gas pressure washer idle for 5 minutes while I move patio furniture?

Unlike electric washers (which shut the motor off when you release the trigger), a gas engine keeps spinning the pump. Without fresh cold water flowing through the nozzle, trapped water inside the pump overheats within 2–3 minutes and can warp pump seals. Shut the engine off whenever you pause.

Will the SIMPSON 80165 15-inch surface cleaner work with the MegaShot MS61222-S?

Yes—the MegaShot's 3,100 PSI and 2.3 GPM fall within the SIMPSON 80165's listed 2,200–3,700 PSI and 2.3–3.4 GPM range.

Driveways, Sidewalks & Heavy Concrete Grime

SIMPSON Cleaning MegaShot MS61222-S Gas Pressure Washer — 3100 PSI, 2.3 GPM, CRX165 Engine

Delivers 3,100 PSI at 2.3 GPM from a CRX165 residential engine and a maintenance-free OEM Technologies axial cam pump with thermal relief, on a welded, powder-coated steel frame with 12-inch never-flat wheels.

Check price on Amazon
27 Verified Pressure Washers & Kits Compared
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