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Simpson Professional 4200 PSI (Gas - Cold Water) Aluminum Frame Pressure Washer w/ Honda Engine & CAT Pump

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Simpson Pressure Washers and Accessories
Model: ALH4240
(Based on expert analysis, manufacturer ratings and customer reviews)
4.4 out of 54.4 out of 54.4 out of 54.4 out of 54.4 out of 5
18 Reviews
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In-Stock In-Stock
Ships Monday, Aug 21st

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HI and AK.
$1,441.00

  • Features
  • Specs
  • 2
    Q&A 
  • 18
    Reviews
  • Articles
  • Shipping
  • Accessories
Grade
Style
Water Pressure
4200
PSI
Water Flow
4
GPM
Cleaning Speed
16800
Cleaning Units
Engine
Honda GX
Honda GX390 OHV Commercial Series Engine With Oil Alert«
Starts easy, runs smoothly, & delivers high output; engine oil is included
Delivers up to 4200 PSI to handle large jobs efficiently

CAT« Industrial Triplex Plunger Pump
Triplex pumps run cooler & last longer than axial pumps; can be rebuilt
Develops up to 4 gallons per minute to clean quickly

Professional Grade Aluminum Platform
Brushed extruded aluminum tubing is strong & lightweight
10 year Factory Warranty on frame components

Dial-N-Wash« Spray Gun
Adjust pressure from 1000 PSI to MAX PSI with a simple twist
Safety lock-out to prevent gun from being accidentally activated

Pro-Style Spray Wand With 5 Quick Connect Nozzle Tips
0░, 15░, 25░, 40░, & soap applicator nozzles shape the spray

3/8" x 50' High Pressure Steel-Braided Hose
Non-marring, kink & abrasion resistant hose lets you work in a wide area

On-Board Accessory Storage
Keeps hose, spray wand & nozzles organized

Siphon Tube Detergent Injection
Lets you use a wide variety of pressure washer-safe cleaners


Engine
Engine Brand
Honda GX
Starter
Recoil
CC
389 CC
Fuel Tank Size
6.4 quarts
Consumer Engine Warranty
3 Years
Commercial Engine Warranty
3 Years
Pump
Pump Brand
Cat
Pump Type
Triplex Plunger
Adjustable Pressure
Yes
Chemical Injection
Siphon Tube
Water Temperature
Cold
Pump Consumer Warranty
2 Years
Pump Commercial Warranty
2 Years
Water Pressure
4200 PSI
Water Flow
4 GPM
Housing
Frame Type
Aluminum
Wheels
Pneumatic
Hose
Hose Storage
Hook
Hose Length
50 Feet
Hose Material
Rubber
Hose Diameter
3/8 Inch
Hose Connections
Quick-Connect
Spray Gun
Spray Gun Connection
Quick-Connect
Spray Gun Grade
Professional
Spray Gun Wand
Single Wand
Spray Tips
Quick Connect Tips (5)
Turbo Nozzle
Sold Separately
Overview
Weight
124 Pounds
Product Length
40 Inches
Product Width
24 Inches
Product Height
26 Inches
Consumer Warranty
1 Year
Commercial Warranty
1 Year
UPC
879399001345
Model
ALH4240
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  2 Questions
Q: Hi Mike, Is the pressure of this model adjustable only through the gun or can you adjust the pressure on this cat pump as well?
by Mark from Missouri on March 08, 2016

A: There is a regulator between the spray gun and spray lance to allow you to dial down your pressure. There is ALSO an unloader valve on the CAT pump allowing you to adjust the pressure there as well.
by Brian, Product Expert
Q: Hi Mike. Do you know what model/part CAT pump is in the ALH4240? Thank you
by Cliff from New Hampshire on March 17, 2015

A: The CAT pump model would be the 67DX pump.
by Brian, Product Expert
Simpson ALH4240 Reviews & Ratings
Overall Rating
Features
4/5
Quality
5/5
Performance
5/5
Value
4/5
Overall
4.4 out of 54.4 out of 54.4 out of 54.4 out of 54.4 out of 5
Pros
Easy To Use (10)
High Quality (7)
I'd Buy It Again (6)
Features (5)
Durable (4)
Cons
Expensive (4)
Heavy (3)
Low Quality (2)
Readboth Reviews (1)
Unreliable (1)
83% of respondents would recommend this product to a friend
18 Reviews  Sort by 
 
Cooper G.
Denton, TX
Purchased from Pressure Washers Direct
Purchased 4/20/15
Total Reviews
2 Reviews
Most Helpful Positive Review
REVIEWED
MAY.
12
2015
5 out of 55 out of 55 out of 55 out of 55 out of 5
Awesome Bank For Your Buck
This is a great deal for a really high quality pressure washer. You cant beat this combo of Honda and Cat. This thing comes with everything you need. It is basically fully assembled right out of the box. All I had to do was put the handle on it, put oil in the motor (supplied), add gasoline and I was done. It started on the first pull.

This thing has a crazy amount of power. I was skeptical about the pressure regulation on the wand but it turned out to be one of the most convenient... more
View Image
Pros: Durable, Easy To Use, Price, Exceeded Expectations
Cooper Recommends This Simpson Product
Was this review helpful?
73
Larry T.
Sayre, OK
Purchased from Pressure Washers Direct
Purchased 7/9/17
REVIEWED
AUG.
03
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Very Nice Unit
Proud of power washer, just would buy from Pressure Washers Direct!
Pros: Easy To Use, High Quality, Quiet, Light Weight
Larry Recommends This Simpson Product
Was this review helpful?
00
James F.
Lafayette, IN
Purchased from Pressure Washers Direct
Purchased 5/30/17
REVIEWED
JUL.
17
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Pressure Washer, Plenty Of Power
If you want enough power and volume of water to do about any cleaning job, this would be one to check out. I use mine for Business, I have two of them, run them every day ( no weekends ).

The Honda engine has brute power and the triple stage Cat pump kicks out 4.5 gal per minute. Water volume is every bit as important as pressure in most cleaning jobs. This unit comes with a wand that has a variable pressure front grip adjustment. If you are cleaning your car and don't want to blow the... more
Pros: High Quality, I'd Buy It Again, Durable, Reliable
Cons: Expensive
James Recommends This Simpson Product
Was this review helpful?
00
Christopher H.
Perrineville, NJ
Purchased from Pressure Washers Direct
Purchased 5/29/17
Total Reviews
2 Reviews
REVIEWED
JUN.
22
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
What Did You Expect
Awesomeness, hope she runs forever. Bought the General Pump power nozzle, cleaning the s... out of everything.
Pros: Easy To Use, I'd Buy It Again, High Quality, Features
Cons: Wish it came with a little man to powerwash for me while i drink
Christopher Recommends This Simpson Product
Was this review helpful?
00
Michael C.
Mattawan, MI
Purchased from Pressure Washers Direct
Purchased 4/30/17
REVIEWED
MAY.
22
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
The Beast!
If you have the money, this is the best! You have to be a little careful. It will take paint off very quickly. It blew the stickers right off my UTV and tractor. There is a dial to turn it up or down.

When power washing our front door water came through the seals and got all over the house.

This will save you time and effort, but again be careful, it's got a lot of power compared to lesser washers.

I wear ear protection while using this product. It is loud.
Pros: Easy To Use, Features, High Quality, I'd Buy It Again
Cons: Heavy, Expensive, Loud
Michael Recommends This Simpson Product
Was this review helpful?
00
Ronald H.
Houston, TX
Purchased from Pressure Washers Direct
Purchased 4/14/17
REVIEWED
MAY.
09
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Power Washing With Ease
Powerful and easy to use. Best Power Washer I have ever used. Actually performs twice as fast as my previous washer.
Pros: Easy To Use, I'd Buy It Again, High Quality, Price
Ronald Recommends This Simpson Product
Was this review helpful?
00
Randy A.
Van Wert, OH
Purchased from Pressure Washers Direct
Purchased 4/7/17
REVIEWED
MAY.
02
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
This Is A Professional Pressure Washer
Received the Simpson pressure washer, by freight carrier, with no damage. Took all of about 10 minutes to assemble, filled crankcase with oil (supplied with the unit) and filled the gas tank.

Quality of the unit is excellent. Very well built, and just a bit on the heavy side. But, this is a professional pressure washer. As soon as you crank up this baby, and pull the trigger for the first time you quickly realize that this isn't like any pressure washers you may have purchased from your... more
Pros: Easy To Use, Exceeded Expectations, High Quality, I'd Buy It Again
Cons: Heavy, Expensive
Randy Recommends This Simpson Product
Was this review helpful?
00
Michael I.
Lawrence, PA
Purchased from Pressure Washers Direct
Purchased 4/3/17
Total Reviews
2 Reviews
REVIEWED
APR.
26
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Wow
Wow this thing has a ridiculous amount of power. I have an excavating company and I used it to clean the mud from the tracks of the skid loaders and excavator.

So fast and powerful. I'm a big guy and I was impressed when I pulled the trigger it pushed my arm back..haha.

Packing was excellent!!
Pros: Easy To Use, Fast, I'd Buy It Again
Michael Recommends This Simpson Product
Was this review helpful?
00
Ray T.
Purchased from Pressure Washers Direct
Purchased 9/29/16
REVIEWED
OCT.
21
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
Awesome Power!
This machine is just awesome - what used to take days now takes hours. I'm really happy with it. It was easy to set-up and get started cleaning without too much time and with no trouble.

More details...

The Honda engine seems to take a long time to warm-up but I assume it's because it's a big engine. It's awfully rough when warming-up, too, and the whole unit shakes quite violently. When it finally gets going, it's smooth and there's plenty of power.

The ability to adjust PSI via... more
Pros: Exceeded Expectations, Features, Fast, High Quality
Ray Recommends This Simpson Product
Brian, the Pressure Washer Expert
Product Expert
Ray,
The Pressure Regulator is sold separately, so it can be added to many existing systems or replace one that's worn out.

Pressure washer sales are very price-sensitive, so manufacturers try to cram the most quality in the smallest price they can- a few dollars shaved here or added there can make a big difference in sales. Keeping the turbo nozzle as an accessory lets folks get used to their pressure washer's abilities and then decide if they need more hard surface cleaning, and allows the manufacturers to compete on fairly equal ground.
more
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01
Mike W.
Lake Jackson, TX
Total Helpful Votes
19 Helpful Votes
REVIEWED
MAR.
25
2015
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Product
I purchased this washer to clean my house and farm equipment. It has done a great job. I have washed the house, driveway, mower, truck and trailer. I am very impressed with the performance of this machine. I would recommend it to anyone needing a pressure washer.
Pros: Durable, Easy To Use, Exceeded Expectations, Reliable
Cons: Expensive
Mike Recommends This Simpson Product
Was this review helpful?
198
Nathan V.
Flagstaff, AZ
Purchased from Pressure Washers Direct
Purchased 1/19/16
REVIEWED
FEB.
16
2016
4 out of 54 out of 54 out of 54 out of 54 out of 5
Mixed Feelings
Pressure washer wand started leaking badly within two hours of very first use. Need to send back, but also need the machine!

Overall, the pressure washer has good power, but it's too early to tell about the overall quality. Very disappointed that I have to deal with the wand situation.
Pros: Easy To Use, Fast, Easy To Store
Cons: Low Quality, Bad Wand
Nathan Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
Nathan,
I am sorry you're having an issue with your wand leaking- I understand how disappointing that can be! First of all, would you please check the wand/handle connection to make sure there isn't something caught in the threads to cause the leak, and that the wand is seated snugly when it's connected to the handle?

If all is well there, then please contact Zac Dawson at Simpson: 1-847-621-8954 or via email at zdawson@fna-group.com. He will be happy to help you in any way possible. If you would please have the serial number of your pressure washer handy when you call, or include it in your email the folks at Simpson will find it helpful.

I don't believe they will have you send the wand back; they should send out a replacement promptly so you lose as little cleaning time as possible.

If there's anything else I can assist with, please feel free to contact me directly at 800-710-7499. We appreciate your business, and apologize for any inconvenience.
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We currently CANNOT ship this product to Alaska, Hawaii or any destination outside of the United States
Priority Shipment
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  • $50 Service Charge
Lift Gate Services
  • Safely Lowers Products Off the Truck
  • Requires Special Hydraulic Lift
  • $50.00 Service Charge
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