Message to Our Customers


Model # DXPW4240

Internet # 203185026

Store SKU # 933063

Honda GX390 4200-PSI 4-GPM Gas Pressure Washer

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

$999.00 /  each


Model # DXPW4240

Internet # 203185026

Store SKU # 933063

Store SO SKU # 933063

These DEWALT machines are guaranteed tough. Built tough to meet the rigorous demands of the cleaning professional or anyone who expects the most out their machine. Perfect for deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services. Our gas-powered machines are equipped with Honda GX OHV commercial series engines. These engines set the standard for durability and long life. The Honda engines are paired with AAATM industrial triplex plunger pumps, a brand with a history of over 40-years of innovation. AAATM pumps are equipped with PowerBoost, this patented technology delivers higher pressure to the spray nozzle, resulting in greater impact and cleaning performance. Exceptionally strong welded steel frame body and pneumatic tires for mobility across most any surface. Pro-style quick connect spray wands and nozzles, with professional spray gun, allows users to operate with ease. High pressure hoses are non-marring, kink and abrasion resistant, and utilizes poly and/or steel-braid technologies for exceptional strength and long-life. For those extra dirty jobs, drop the detergent siphoning tube into pressure washer safe detergent and attach the soap applicator nozzle.

California residents: see  Proposition 65 information

  • Honda GX390 OHV commercial series engine with oil alert starts easy, runs smoothly, and delivers high output - engine oil is included
  • AAA by Comet industrial triplex plunger pump with ceramic coated pistons and adjustable unloaded for controlled pressure
  • 3/8 in. x 50 ft. high pressure steel-braided hose is non-marring, kink and abrasion resistant, and equipped with quick connectors
  • Welded steel frame, steel engine plate, solid steel axle and 13 in. pneumatic tires for extreme durability and effortless maneuverability
  • Pro-style spray wand with 5 quick connect nozzle tips - 0 degrees, 15 degrees, 25 degrees, 40 degrees, and soap applicator nozzle
  • Professional spray gun with side grip designed to be comfortable and easy to operate - safety lock to prevent gun from being accidentally activated
  • Convenient on-board accessory storage for spray gun/wand, high pressure hose, and nozzles
  • Downstream detergent injection system for convenient use of cleaners
  • Limited warranty, commercial use 3-years on Honda GX engine, 5-years on AAA pump, 1-year frame components, 90 days on spray accessory items
  • Note: Product may vary by store
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Assembled Depth (in.) 
37 in 
Assembled Height (in.) 
28 in 
Assembled Width (in.) 
23 in 
Hose Diameter (In.) 
3/8 in 
Hose length (in.) 
Wheel Diameter (in.) 
13 in 
CA (CARB) Compliant 
CARB Compliant 
Detergent tank 
Engine Displacement (cc) 
Engine Make 
Engine Type 
HONDA GX390 Commercial Series OHV Engine with Oil Alert® 
Foldable handle 
Fuel tank capacity (gallons) 
Hose Material 
Maximum Pressure (PSI) 
Number of tips included 
Onboard storage 
PSI Range 
3200+ PSI 
Pressure Washer Power Type 
Product Weight (lb.) 
129 lb 
Pump Brand 
Pump Type 
Start Type 
Translucent fuel tank 
Water capability 
Warranty / Certifications
Manufacturer Warranty 
Limited Warranty - Commercial Use - 3 Years on Honda GX engine, 5 Years on AAA pump, 1 Year frame components, 90 Days on spray accessory items 


Rated 4.3 out of 5 by 66 reviewers.
Rated 5.0 out of 5.0 by Excellent pressure washer with excellent power I have pressure washed for over 20 years now and my old Honda GX390 finally went out. The reason I chose this model was strictly because of the Honda GX390 engine. You cannot go wrong with the Honda GX390 engine and the pump is also great quality. The only change I would make or add on to this pressure washer would be to replace the straight open detergent connection with an adjustable detergent connection. I know this is petty but it allows you to control the volume of detergent to use when cleaning a house with heavy mold and mildew as opposed to a house with light mold or mildew. Changing this out would be around $10 - $15. This pressure washer is very powerful and I got done with jobs I've done in the past much quicker with this unit. The hose and gun are average quality but that is not why you buy this pressure washer in the first place. If this is your first pressure washer, get ready for a quick learning curve. I would suggest adjusting the pressure way down until you are comfortable with it because it has tons of power. I would recommend this pressure washer to anyone. Especially professionals. After you use it and store for a while, make sure you use a pump save kit to inject int the pump for long periods of storage with no use. This will help keep your seals and components inside the pump nice and lubricated. It's too nice of a pressure washer to skip this simple maintenance step. October 29, 2013
Rated 5.0 out of 5.0 by best all around washer. great value! Have used this washer for well over 400hrs without a hick up. This machine has done all that i have asked. Just service it on time.Washed heavy equiptment for the TVA , concret, brick, driveways, vinyl siding and vehicles.Great machine for the weekend warior or a professional. March 7, 2012
Rated 5.0 out of 5.0 by Awesome, Awesome, Awesome !!!!! I own a painting company. After shopping around for 3 weeks for a new pressure washer I decided on the Dewalt. This is a serious machine. I love it and as a Professional I recommend it to anyone looking for a 4200. March 3, 2013
Rated 5.0 out of 5.0 by Great pressure washer!! I bought my first gas pressure washer probably 12 years ago. It was 1800 psi and did the job but it took forever to do our driveway and pool deck. I had been putting off the task of cleaning these this year for that reason but couldn't put it off any longer. I looked at several pressure washers that are comparable to this unit and ultimately decided on this one. Glad I did .... it is awesome!! For the first time I didn't spend the entire weekend pressure washing. Admittedly the unit is probably overkill, but oh well. It runs great, is reasonably quiet (I think it is actually quieter than my old unit with a much smaller engine), and does a great job!! December 10, 2014
Rated 1.0 out of 5.0 by Everything exceptional except the Comet pump. Comet pump failed after about 200 hours (6 months). Took it to 2 "authorized service centers" and after 4 months finally got an answer from Comet (FNA). Sorry, out of warranty. What happened to the 2 year warranty? Anyway, wont buy another Dewalt as long as the Comet pump is used. Took the Honda engine, mounted it to my trailer and attached a TX1510G8UI General pump. Wow, what a difference!!! General pump is more superior than the Comet. And , I priced out a Honda GX390 and a General pump....its a bit cheaper than buying the Dewalt unit and i got a better system. December 16, 2014
Rated 5.0 out of 5.0 by Quick ship to store Ordered online with a ship to store, delivery was estimated at two weeks and received within one. Excellent price for this rated unit. April 29, 2015
Rated 5.0 out of 5.0 by This product is awesome!!! I gave it five stars After much research, I decided to purchase this 4200 psi Dewalt pressure washer, with a 13 hp Honda engine. After adding oil and fuel, it started on the first pull. I was blown away by amount of pressure and cleaning power it produced with the #40 tip. It reduced my cleaning time by 30-40 percent from what it took with my 3500 psi washer. You just can't go wrong buying this machine. I have using pressure washers for over 14 years, ranging from 2500 to 4000 psi and this the by far the best overall value and performance of all September 4, 2013
Rated 5.0 out of 5.0 by Washer problems? If your having problems with this washer it's prolly an easy fix. I had major issues with mine and after changing every part imaginable I discovered it was a faulty gas cap. The cap won't vent and the carb can't get enough fuel to run right and dies. If your having problems loosing the cap enough to let some air in and try that. If it works you can get a new cap for it pretty cheep. January 22, 2015
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Curbside Truck Shipping (By Appointment) includes delivery to receiving area/dock for businesses or curbside for residential orders. The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.