Model # DH4240B

Internet #202066580

Store SKU #268912

DEWALT Honda GX390 4,200 psi 4 GPM Belt Drive Gas Pressure Washer


Honda GX390 4,200 psi 4 GPM Belt Drive Gas Pressure Washer

  • Reliable high performance premium HONDA GX390 Engine
  • General Pump Triplex Plunger Pump
  • Steel-Braided Quick Connect high pressure hose
$1,299.00 /each

Frequently Bought Together

Product Overview

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 OHC commercial series engine with oil alert is easy starting, light weight and quiet, yet powerful - engine oil is included
  • AAA by comet industrial triplex plunger pump with ceramic coated pistons and adjustable unloaded for controlled pressure
  • Dual belt-drive system for longer pump and engine life
  • 3/8 in. x 50 ft. high pressure steel-braided hose is non-marring, kink and abrasion resistant and equipped with quick connectors
  • Pro-style spray wand with 5 quick connect nozzle tips- 0°, 15°, 25°, 40° and soap applicator nozzle
  • Professional spray gun designed to be comfortable and easy to operate - safety lock-out to prevent gun from being accidentally activated
  • Welded steel frame, steel engine plate, solid steel axle and 13 in. pneumatic tires for extreme durability and effortless maneuverability
  • 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-year on Honda GX engine, 5-year on AAA pump, 1-year frame components, 90 days on spray accessory items
  • Choose the best nozzle that fits your pressure washer needs:

    Pressure Washer Nozzle Selection Guide

Info & Guides

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$999.00 /each
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Name Honda GX390 4,200 psi 4 GPM Gas Pressure Washer Honda GX390 4,200 psi 4 GPM Belt Drive Gas Pressure Washer Water Blaster 3,200 psi 3.0 GPM Belt Drive Gas Pressure Washer Powered by Honda Water Blaster 4,200 psi 4.0 GPM Belt Drive Gas Pressure Washer Powered by Honda
Brand DEWALT DEWALT Simpson Simpson
Ratings (86) (20) (2) (1)
Maximum Pressure (PSI) 4200 4200 3200 4200
Pressure Washer Power Type Gas Gas Gas Gas
Commercial Yes Yes Yes Yes
GPM 4 4 3 3.5
Included Onboard storage,Wheels Onboard storage,Wheels Wheels Onboard storage,Wheels
Features Chemical/detergent injection,Quick connect tips Chemical/detergent injection,Quick connect tips Chemical/detergent injection,Quick connect tips Chemical/detergent injection,Quick connect tips
Refurbished No No No No
View Product View Product View Product View Product




Warranty / Certifications

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Customer Questions & Answers

Part for dewalt 4200 PSI dewalt power washer

. I need to replace the hose wand and nozzles. Where can I purchase just these items.
Asked by: Nick
Contact the customer service line at 877-362-4271 for assistance with parts
Answered by: DJH1916
Date published: 2016-07-08

Does this spray hot water?

Asked by: Brion
Answered by: SBD_Product Expert
Date published: 2016-06-21

General Pump?

The product description says it has a General Pump in one place but in another it says it has a Comet AAA. What is the pump because it can't be both?
Asked by: JB
THE DXPW4240B currently comes with a AAA pump by Comet. The General pumps were used from 2010 to 2013
Answered by: DJH1916
Date published: 2016-06-02

need to know if this model comes auto idle.

Asked by: Felix
The DXPW4240B utilizes a Honda GX390 engine which has Auto Idle and adjustable throttle.
Answered by: DJH1916
Date published: 2016-03-22
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Customer Reviews

Honda GX390 4,200 psi 4 GPM Belt Drive Gas Pressure Washer is rated 4.0 out of 5 by 20.
Rated 1 out of 5 by from First one DOA.... wouldn't start. My first Honda engine with any type of problem. Ship to store n... First one DOA.... wouldn't start. My first Honda engine with any type of problem. Ship to store not a great experience, as the freight company to my locale did it promptly, but then the shipment disappears into a black hole until the store finally gets it, unpacks it and notifies you. Would never compete with Amazon.
Date published: 2017-01-23
Rated 4 out of 5 by from Very Powerful, good value After 20 years of light use, my 3200 psi pressure gave it up. The new De Walt pressure washer has plenty of power and was easy to assemble. I went with the belt driven model in hopes of extending the life of the pump, which has been weak link in a pressure washer. I also purchased the garden hose inlet filter as additional insurance. Very pleased with the purchase. Would have given it five stars, but the instructions clearly state not to use chlorine bleach products as a cleaning agent, so I was unable to use my Jomax-bleach solution that is really needed for mold and mildew on the Texas Gulf coast. The ZEP pressure washer safe siding cleaner does not get the job done. When using an 18 foot telescoping wand, the pressure needed to remove mold and mildew without a bleach solution makes control unwieldy.
Date published: 2015-05-20
Rated 4 out of 5 by from very good homeowner unit Bulletproof engine and belt drive to reduce the temperature and vibrations at the pump. But last years model had an external pressure relief system. This one is internal and that was a surprise to me. They also switched from a general pump to something else, and the general is known for its forgiveness in not scavenging the supply hose if the flow is inadequate. Still, for the money, its the best belt drive out there. It also has no external incoming water filter, and that is something I find mandatory. Its only a few bucks to add so its not a deal breaker.
Date published: 2014-02-18
Rated 5 out of 5 by from Excellent Machine (noobie here. It didn't start) I purchased two. The fist unit, I was unable to make it work. Reviewer here named "Builder" appear to have had the same problem. Because the unit is not sold at the store and I couldn't wait, I had to order a second one. I had the same problem and it didn't start. At that point, I knew, it's either a terrible product or I'm doing something really wrong. I found the instruction contradicting each other. There are two sets of instructions. One is for the pump and the other for the engine. That was NOT clear to me (first time using a pressure washer and not much experience with gas machines). The instructions said "make sure each time, you check the oil is OK. There is a dot make sure oil is up to that line". Instruction also said, for your convenience, we have already filled it up with oil". So what's the problem? The instruction did not say "make sure BOTH sections of the pressure washer need oil". The instructions did not make this clear. When I checked the oil, oil was fine but there was no engine oil in the machine. Therefore, the machine would not start. I took it to Home Depot and the guy (manager) tested it and couldn't find anything wrong with it so I returned the first unit. I needed a machine so I ask if there is anything else I can try with the second one that I have in my house. He suggested to take it to the larger Home Depot that have a repair center. The guy there checked and asked, "did you put oil?" I said, the instructions said oil has already been added and to check, which I did. Then he said, "what about the engine oil?" and I said "what?" At that point, I just want to put my head in a bucket and hit myself with a brick. He added oil and without the choke pull the trigger and the machine started. Took the machine back home, with no choke, I pulled the trigger and the machine started just fine with one pull. I re-started it multiple times since and it only needs a single pull. Lots of power, easy to start, HEAVY but has wheels. Love it! I just hope it lasts for a while.
Date published: 2014-09-10
Rated 5 out of 5 by from Got the power Well pleased with this washer it has great power. It is heavy and you will need help to load in truck or ramps.
Date published: 2013-06-04
Rated 5 out of 5 by from Great features and price This unit really gets the job done. It's more compact than some other belt drive models that I looked at. I had some entrenched algae and mold on a wall where rain splashed up on it and this unit got into the stucco deep enough to get it out. The only improvements that I can think of would be to make the handle removable and make the wand holder such that it holds the wand up above the tire. It would also be nice if they offered a hose reel, as an accessory--a simple one that would just store the hose would suffice.
Date published: 2011-07-09
Rated 5 out of 5 by from It is well made It is easy to use and has alot of pressure. It's great that you can adjust the amount of pressure to what you need. I have used it to remove paint on brick walls, and to clean our sidewalks and store fronts.
Date published: 2013-04-04
Rated 4 out of 5 by from Research Pays Off! I had a Karcher 3500PSI Honda Engine for many years, constantly broke down (the pump). Finally decided to try this model. Did a lot of research. Warranty, price, PSI, and its from a company that should backup the product (both Dewalt and HD, yes I know its not made by Dewalt). Used the machine for about 15 hours continuously so far. Results, this is a powerful machine, and seems lightweight for the capacity. The wand uses the plug in's for pressure control width and intensity. Unfortunately, I do not see a valve to control water flow. There is a valve to control detergent flow. Frankly, for the price you aren't going to beat this one. The warranty seems good given that the pump units are prone to breakdown. Instructions were poor. Overall, I am so far pleased.
Date published: 2014-08-15
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