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Model # 6412

Internet # 204158448

3,000-PSI One Wash Variable Speed Gas Pressure Washer-DISCONTINUED

This item has been discontinued.
The Home Depot no longer carries this specific product.

$449.00 /each




Model # 6412

Internet # 204158448

The new OneWash from Generac. It’s four power washers in one. The OneWash features the largest, most powerful engine in its class and our innovative PowerDial gives you total control at the turn of a dial. Easily adjust the intensity of the spray to clean a wide range of different surfaces like automobile finishes, aluminum and vinyl siding, decks and fences and the toughest brick and concrete, all with a single, easy-to-use control.

  • It’s four power washers in one, with variable-pressure technology for a wide range of tasks
  • Generac 212 cc OHV engine largest, most powerful engine in its class
  • Automatic system protection cuts power to the unit if the oil or water runs low
  • Comfort-grip handle provides greater comfort for ease of use
  • Ergonomic inverted trigger reduces user fatigue
  • Rear hose connection on gun provides better balance and comfort
  • Consolidated control panel puts all your controls in one easily a ccessible location
  • Horizontal axial cam pump makes hose connections a snap
  • Precision balanced for stability and effortless mobility
  • Wide, never-go-flat 11 in. wheels for easy transport regardless of terrain
  • Drainable detergent tank allows for easy cleaning of tank after each use
  • Folding/nesting handle for compact storage

Info & Guides

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Assembled Depth (in.) 
20.6 in 
Assembled Height (in.) 
39.5 in 
Assembled Width (in.) 
21 in 
Hose Diameter (In.) 
.25 in 
Hose length (in.) 
CA (CARB) Compliant 
Not CARB Compliant 
Detergent tank 
Engine Displacement (cc) 
Engine Make 
Engine Make 
OEM Branded 
Engine Type 
Generac OHV 
Foldable handle 
Fuel tank capacity (gallons) 
Handle Material 
Hose Material 
Maximum Pressure (PSI) 
Number of tips included 
Onboard storage 
Pressure Washer Power Type 
Product Weight (lb.) 
68.5 lb 
Pump Brand 
Annovi Reverberi 
Pump Brand 
Anno Reverberi (AR) 
Pump Type 
Pump Type 
Start Type 
Translucent fuel tank 
Water capability 
Warranty / Certifications
Manufacturer Warranty 
2 Years Limiited 


Rated 4.7 out of 5 by 279 reviewers.
Rated 5.0 out of 5.0 by Unit delivered in good condition. The unit was delivered a day earlier than promised and was very well packed and in excellent condition. All parts were in sealed bags. Assembly couldn't have been easier. I put in the oil, (it accepted the full 20 oz). Filled the tank with fresh gas, pulled the cord 3 times and it was ready to go to work. I did the easy stuff first, washed my car and wife's car, played with the high pressure nozzle and then filled out the registration on line and wrote up this review. When I get a little more ambition, I will use it to remove moss from the brick siding. If I happen to run into any problems, I'll report those as well. September 9, 2015
Rated 5.0 out of 5.0 by This unit rocks I purchased the Onewash system after doing a review of many of the previous purchasers. The consensus by an overwhelming majority was 5 stars and I completely agree, the engine is easy starting, setup was easy and the unit has tremendous pressure. I really like the variable pressure settings. The only issue I had was the siphon hose was not in the box when I unboxed the unit. But I called Generac's customer service and they were very helpful and indicated that they were sending out a siphon hose with no charge. I definitely would recommend this to anyone interested in a pressure washer. September 9, 2015
Rated 5.0 out of 5.0 by The ease of operating power washer one. Here's how it starts. I read instruction for my power washer one. Put oil in engine and filled gas tank both to proper levels. Attached all lines spray nozzle and soap despencing attachment. Rolled my power washer one outside and with a single pull it's running. I was impressed how quite it is no ear plugs needed but I always use all safety gear. Eye, ears,boots and hand protection. I started off power washing my house. Quickly I moved to the roof of my house all that green alge washed away now the gutters on to side walk then the driveway. To end this I washed both cars all this in first day of my power washer one. Only thing in my life that's better is my wife... Does it come across LOVE my power washer one.the September 9, 2015
Rated 5.0 out of 5.0 by This product is great for everything around the house One wash came to me very fast when ordered . Assembly was easy . Once assembled, oil and fuel added , it started on second pull . Very impressed with the dial for different pressure settings and the detergent tank for soap . I wash house , fence , driveway , vehicles and atvs. Works great on everything . I did have a bit of bad luck with the folding handle . Black plastic piece where the orange knob tightens for the folding handle broke . Warranty is covering it so not a big deal . My opinion is plastic is not strong enough to be supporting weight of pressure washer when tilting back to move pressure around , should be metal to support the weight . I'm kinda concerned in the future when my warranty runs out , maybe the other side won't break. Other than that , it's a great pressure washer and would buy another one in an instant , great product . September 11, 2015
Rated 5.0 out of 5.0 by Best Pressure Washer every The pressure washer is the best one I have every had. I would suggest Generac products to everyone that wants the best. I also own generac product RS 7000E Generator. I bought the generator for a wedding and it performed perfectly. I love the auto start feature, I would suggest this to anyone that needs a portable generator. swinneym Florence AL September 15, 2015
Rated 5.0 out of 5.0 by Ordered this product from home depot Appears to be made well easy and not much to put together ever thing came with it even oil for it only thing it was on sell last week too late for that to get a good price September 16, 2015
Rated 5.0 out of 5.0 by I give it 5 stars in all areas. The washer works just as the manufacturer says it will. The variable power settings are great and with the special nozzles this washer will tackle any job. I've cleaned my boat, truck and deck as well as the eve troughs on the house. I think that is a pretty good test run. The only problem I have is getting the oil filler tube in the right position to fill or add to the oil. September 6, 2015
Rated 5.0 out of 5.0 by GREAT machine! The absolute best pressure washer I've owned and I've had 2 other machines that couldn't come close to the features, power and versatility of the Generac. Don't even look at any other pressure washer....... September 10, 2015
  • 2015-10-02T14:00:28.659-05:00
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