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HydroWashers
Gas · 2026

The Best Gas Pressure Washers

Maximum power and flow for driveways, siding, fences and paint preparation.

Updated October 2026 · Independent research · Prices on Amazon

Gas washers deliver two to three times the cleaning power of typical electrics. Look for a proven engine (Honda GC/GX are the reference), a steel frame and pneumatic wheels. Never run a gas washer in a garage, shed or any enclosed space — engine exhaust contains carbon monoxide.

At a glance

ModelTypeMax PSIGPMPrice
Simpson MegaShot MSH3125Best gas overallGas3,2002.5$$$Amazon
Westinghouse WPX3200Best gas valueGas3,2002.5$$Amazon
Simpson PowerShot PS3228Best pro-gradeGas3,3002.5$$$Amazon
Gas
01
Best gas overall

Simpson MegaShot MSH3125

Honda-powered and built on a welded steel frame, the MegaShot is the gas washer we point most buyers toward for driveways, fences, siding and paint prep.

Max PSI
3,200
Flow
2.5 GPM
Power
Honda GC190 engine
Price
$$$

Why we like it

  • Reliable Honda engine, easy starts
  • Welded steel frame with pneumatic wheels
  • High flow cuts big jobs short

Keep in mind

  • Loud — hearing protection required
  • Needs fuel storage and seasonal maintenance
Check price on Amazon
Gas
02
Best gas value

Westinghouse WPX3200

Comparable output to premium gas units at a friendlier price, with an onboard soap tank and a sensible accessory kit.

Max PSI
3,200
Flow
2.5 GPM
Power
196 cc engine
Price
$$$

Why we like it

  • Strong output for the money
  • Onboard detergent tank
  • Five quick-connect tips

Keep in mind

  • Engine is less proven than Honda
  • Heavier to lift into a vehicle
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Gas
03
Best pro-grade

Simpson PowerShot PS3228

A step up for heavy, frequent use — commercial-grade engine and pump for owners who clean multiple properties or rental units.

Max PSI
3,300
Flow
2.5 GPM
Power
Honda GX200 engine
Price
$$$

Why we like it

  • Commercial-grade Honda GX engine
  • Built for long duty cycles
  • Excellent resale and parts support

Keep in mind

  • Premium price
  • Overkill for occasional patio cleaning
Check price on Amazon