Pressure Washers
Simpson Clean Machine 3400 Specs: 3,400 PSI, 2.5 GPM
Quick answer
The Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer is rated at 3,400 PSI and 2.5 GPM, about 8,500 cleaning units. That covers concrete driveways and every lighter surface when you use a wider tip and more distance. It listed at $329.99 when this page was compiled.
On this page
- What are the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer specs?
- What is the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer sized for?
- What features does Simpson list?
- Who is the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer a good fit for?
- What are the alternatives to the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer?
- How do they compare on specs?
What are the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer specs?
| Spec | Value |
|---|---|
| Pressure | 3,400 PSI |
| Flow | 2.5 GPM |
| Engine | 208 cc |
| Hose | 25 ft |
From Simpson's published specifications and the product listing.
What is the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer sized for?
| Surface | Typical PSI range | Suitable? |
|---|---|---|
| Cars and trucks | 1,200 to 1,900 | Yes, back off with a wider tip or more distance |
| Vinyl siding | 1,300 to 1,600 | Yes, back off with a wider tip or more distance |
| Soft wood decks (cedar, pine) | 500 to 800 | Yes, back off with a wider tip or more distance |
| Hardwood and composite decks | 1,000 to 1,500 | Yes, back off with a wider tip or more distance |
| Brick and pavers | 1,500 to 2,500 | Yes, back off with a wider tip or more distance |
| Concrete driveways | 2,500 to 3,000 | Yes, back off with a wider tip or more distance |
Pressure washers can cause injection injuries that need emergency care. Never point the wand at people or pets, never use a 0 degree tip on wood or siding, and never operate from a ladder.
What features does Simpson list?
Simpson lists these features for the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer:
- SIMPSON PRESSURE WASHER FOR HOMEOWNERS: The Simpson Clean Machine gas power washer cleans decks, driveways, siding, fencing, patio furniture, and cars; The cold water machine is great for homeowners; 49-State Compliant (Not for sale in California)
- ENGINE & PUMP: 208 cc CRX engine starts easily and includes low-oil shutdown; 3400 PSI 2.5 GPM OEM Technologies axial cam pump is maintenance-free with a thermal relief valve to help prevent overheating
- LONG HOSE REACH: The Simpson MorFlex series 25' high-pressure hose resists kinks and abrasion; Non-marring hose helps protect finished surfaces; Quick-connect fittings speed setup
- EASY MOBILITY: 10" premium pneumatic tires roll smoothly over gravel, grass, and curbs; Balanced layout improves transport; The welded steel frame with powder-coated finish is easy to assemble and resists corrosion; 37" L x 30" W x 21" H; 64 lb.
- PRESSURE WASHER ACCESSORIES FOR DIY-ERS: Four quick-connect pressure washer tips (0°, 15°, 40°, and soap nozzle) cover tasks from washing windows to car cleaning; Ergonomic front-load M22 pressure washer gun and 16" spray wand included
Who is the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer a good fit for?
Best for homeowners stepping up to gas for driveways and decks. 208cc CRX engine with low-oil shutdown driving a maintenance-free axial cam pump at 3400 PSI and 2.5 GPM, on 10 in. pneumatic tires. It sits in the Intermediate tier of our pressure washers coverage. See how it ranks against the rest in the best pressure washers.
What are the alternatives to the Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer?
RYOBI 2500 PSI 1.2 GPM Electric Pressure Washer
$327.91High performance cold water electric unit rated at 2500 PSI and 1.2 GPM for decks, fences, siding and vehicles.
Best for: homeowners who want more pressure than entry electrics
Check price on Amazon
Westinghouse WPX3400 3400 PSI 2.6 GPM Gas Pressure Washer
$349.00212cc OHV engine at 3400 PSI and 2.6 GPM with a half gallon soap tank, never-flat wheels and 3-year coverage.
Best for: driveways, siding and fences on a mid-range budget
Check price on Amazon
Greenworks 3000 PSI 2.0 GPM Brushless Electric Pressure Washer
$349.99TruBrushless 14 amp motor with 3000 PSI and 2.0 GPM (3300 cleaning units) that Greenworks says an independent lab verified, a metal gun and 25 ft kink-resistant hose.
Best for: driveways and siding without the upkeep of a gas engine
Check price on AmazonHow do they compare on specs?
| Model | Price | Pressure | Flow | Hose | Engine |
|---|---|---|---|---|---|
 Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer | $329.99 | 3,400 PSI | 2.5 GPM | 25 ft | 208 cc |
| RYOBI 2500 PSI 1.2 GPM Electric Pressure Washer | $327.91 | 2,500 PSI | 1.2 GPM | - | - |
| Westinghouse WPX3400 3400 PSI 2.6 GPM Gas Pressure Washer | $349.00 | 3,400 PSI | 2.6 GPM | 25 ft | 212 cc |
| Greenworks 3000 PSI 2.0 GPM Brushless Electric Pressure Washer | $349.99 | 3,000 PSI | 2 GPM | 25 ft | - |
Frequently asked questions
Where do these Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer specs come from?
The figures on this page come from Simpson's published specifications and the product listing's own feature list. Sizing tables are our estimates from standard formulas, not measurements of a unit, and real results vary with conditions. Confirm details against the operator manual before you buy or use it.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.