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SIMPSON Cleaning ALH3425 Aluminum Series 3600 PSI Gas Pressure Washer, 2.5 GPM, Honda GX200 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 5/16-inch x 35-foot MorFlex Hose, 49-State

4.2 4.2 out of 5 stars 1,389 ratings

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3600 PSI Honda GX200

Purchase options and add-ons

Customer ratings by feature

Easy to assemble
4.3 4.3
Light weight
4.3 4.3
Easy to use
4.0 4.0
Maneuverability
4.0 4.0

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SIMPSON Cleaning ALH3425 Aluminum Series 3600 PSI Gas Pressure Washer, 2.5 GPM, Honda GX200 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 5/16-inch x 35-foot MorFlex Hose, 49-State
SIMPSON Cleaning ALH3425 Aluminum Series 3600 PSI Gas Pressure Washer, 2.5 GPM, Honda GX200 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 5/16-inch x 35-foot MorFlex Hose, 49-State
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Price$767.95$329.99$589.99$399.99$377.99-15% $84.99
Typical:$99.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Easy to use
4.0
4.2
4.1
4.1
4.0
4.6
Maneuverability
4.0
4.8
4.3
4.3
3.9
4.6
Value for money
3.7
3.7
3.0
3.0
4.2
4.4
Easy to assemble
4.3
4.4
4.4
4.4
4.2
Sold By
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Powermall
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VISCOUNT LLC
maximum pressure
3400 pounds per square inch
3500 pounds per square inch
3400 pounds per square inch
3300 pounds per square inch
2800 pounds per square inch
2000 pounds per square inch
power source
Gas Powered
gas powered
Gas Powered
Gas Powered
gas powered
Corded Electric
maximum flow rate
2.5 gallons per minute
2.5 gallons per minute
2.5 gallons per minute
2.4 gallons per minute
2.3 gallons per minute
3.7 gallons per minute
hose length
25 feet
25 feet
25 feet
25 feet
25 inches
15 inches
specification met
sae
oem
oem
CE, CSA
tank volume
2.5 gallons
1 gallons
2.3 gallons
3.7 gallons
model number
ALH3425
61110S
61147S

From the manufacturer

Aluminum Series Banner
ALH3425 A+ header pressure washer

simpson logo

With over 60 years of industry-leading experience built into each of our products, it is easy to see why backyard heroes and job site champions everywhere prefer the SIMPSON Advantage.

  • 60 years of innovation and technology breakthroughs
  • Solutions for every shopper, from DIY to large industry
  • Accessories to expand the uses
  • Replacement parts to extend the life of your machines

ALH3425 Aluminum Gas Pressure Washer Powered by Honda

Designed to meet the rigorous demands of the cleaning professional, the SIMPSON Aluminum Series frame is crafted of aircraft-grade aluminum, making it lighter than most steel frame pressure washers. Perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services. The SIMPSON Aluminum Series is designed for optimum performance in the harshest environments.

  • HONDA GX200 engine with a low oil shutdown feature
  • Reliable AAA industrial triplex plunger pump

ALH3425 Aluminum Series Features

engine

pump

hose

tire

3600 PSI at 2.5 GPM

HONDA GX200 engine with a low oil shutdown feature

Know when to change your oil

Reliable AAA industrial triplex plunger pump features sight glass and advanced oil seal technology eliminates the need for a dipstick. With visibility to the oil level and the oil itself, you can easily see when oil levels are low or when dirt or water has contaminated the oil

Convenient hose storage to ensure durability

MorFlex 5/16-in. x 35-ft. the high-pressure hose is non-marring, flexible and abrasion-resistant

Durability and portability

10 in. Premium pneumatic tires for ease of maneuverability across various terrain

ALH3425 nozzles

ALH3425 lifestyle

ALH3425 specs

disclaimer

Convenient storage for sprayer tips

Includes 5 Quick connect nozzle tips: 0°, 15°, 25°, 40° and soap to use for a variety of cleaning applications

Power for every professional job

  • Deck cleaning
  • Wood restoration
  • Paint preparation
  • Graffiti removal
  • All other professional cleaning services

Specifications and Dimensions

  • Power Type: Gasoline
  • Drive Type: Direct
  • PSI: 3600
  • GPM: 2.5
  • Gun: 3/8" QC Connection
  • Wand: QC spray lance
  • Frame: Aircraft grade aluminum

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MSH3125 ps3228 ALH3425 CM60912 ALWB60828
MegaShot PowerShot Aluminum Series Clean Machine Water Blaster
Customer Reviews
4.4 out of 5 stars
9,148
4.2 out of 5 stars
2,896
4.2 out of 5 stars
1,389
4.3 out of 5 stars
1,646
3.1 out of 5 stars
36
PSI 3200 3300 3600 3400 4200
GPM 2.5 2.5 2.5 2.5 4.0
Pneumatic Tires
Accessory Bundle Options
Engine Honda Honda Honda CRX Honda
Best for Residential Use Commercial Use Commercial Use Residential Use Commercial Use

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SIMPSON

SIMPSON Cleaning ALH3425 Aluminum Series 3600 PSI Gas Pressure Washer, 2.5 GPM, Honda GX200 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 5/16-inch x 35-foot MorFlex Hose, 49-State


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Product Description

Designed to meet the rigorous demands of the cleaning professional, the SIMPSON Aluminum Series frame is crafted of 100% aircraft grade aluminum, making it lighter in weight than most steel frame pressure washer designs. Perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal and all other professional cleaning services. The SIMPSON Aluminum Series designed for optimum performance in the harshest environments.

Customer reviews

4.2 out of 5 stars
4.2 out of 5
1,389 global ratings

Customers say

Customers like the value and power of the pressure washer. For example, they say it's a great product for the money, has serious power, and is quiet even on the lowest setting. Customers are also impresseded with the weight. That said, some complain about the warranty, with some complaining that the pump arrived damaged. Opinions are mixed on maneuverability, ease of operation, quality, and the pump.

AI-generated from the text of customer reviews

47 customers mention47 positive0 negative

Customers are satisfied with the power of the pressure washer. They mention that it has serious power, is easy to start, and is quiet even on the lowest setting. Some appreciate the build quality, engine power, and pressure of the pump. Overall, most are happy with their purchase and recommend it to others.

"When it is working, it’s so powerful and smooth. Design and built seems and feels high end and durable, however, it is VERY HARD to start...." Read more

"...It is very powerful. I did my driveway after it arrived. I learned something NEW today, even as old as I am...." Read more

"...Nice power and engine ran smoothly. I did jump up to a 3/8 x 50 foot hose did not use the 5/16 hose that came with it...." Read more

"...Overall I’m pleased with the build quality, engine power, and pressure of the pump. It starts easy and it pretty quiet for the size of the machine." Read more

29 customers mention22 positive7 negative

Customers like the value of the pressure washer. They say it's a great product for the money, and well worth the price.

"...Industrial duty and rebuildable, it's the best money can buy. And when it comes to pressure washers, it's really all about the pump...." Read more

"...Worth every penny!" Read more

"While this is a decent value, good engine (Honda GX200) and pump (CAT 4DNX25GSI) it has some major design flaws and poor warrantee support...." Read more

"...units come with 50' standard, although the units are heavier and more expensive...." Read more

23 customers mention19 positive4 negative

Customers like the weight of the pressure washer. They mention it's light weight, durable, and easy to use. Some say it'll fit in their SUV. Overall, most are satisfied with the weight and size of the product.

"...It's nice to know that it will never rust and weight has been kept to a minimum. As for the CAT pump, what's not to like?..." Read more

"The Good: This unit is lightweight, but built solid. Great to move around and store. I have no worries about it lasting for a long time...." Read more

"It’s got plenty of pressure and this machine is light, make sure you buy one with a cat pump, lot better of a pump" Read more

"...it it’s a lot smaller than it looks in the picture and it’s not very heavy at all with the aluminum frame...." Read more

241 customers mention157 positive84 negative

Customers are mixed about the quality of the pressure washer. Some mention that the included pressure hose is very high quality with nice quick-connects, and it has a good engine. However, others say that it failed on the second outing, kept backfiring, and refused to start while brand new.

"...Delivery was fast, the pressure washer was in perfect condition and once I got the oil into the engine and gassed it up, the engine started on the..." Read more

"The Good: This unit is lightweight, but built solid. Great to move around and store. I have no worries about it lasting for a long time...." Read more

"...I found the hose needs a bit of attention to deliberately lay out according to your intended cleaning path because loops and twists are not easily..." Read more

"It’s got plenty of pressure and this machine is light, make sure you buy one with a cat pump, lot better of a pump" Read more

80 customers mention54 positive26 negative

Customers are mixed about the ease of operation of the pressure washer. Some mention it's easy to start, simple to assemble, and fast. They also say the instructions are easy to use for a general contractor. However, other customers say it'd be difficult to get started and once it did start it kept backfiring. The hose is stiff and hard to manage, making it awkward to work with.

"Excellent machine to get started with, making some extra money.14" surface cleaner works well with this 2.5 gpm machine...." Read more

"...The quick connect fittings on each end of the hose are very convenient and allow additional hose sections and easy storage...." Read more

"...built up so fast, if the first attempt wasn't successful, no way to start at the second...." Read more

"...If you hold the trigger, it is easy to start since the build of of pressure does not occur...." Read more

25 customers mention14 positive11 negative

Customers are mixed about the maneuverability of the pressure washer. Some mention that it's easy to pull if you release the pressure by squeezing the wand trigger, it starts with half a pull, and is very light. However, others say that it does not maneuver very easily, is very rigid, and needs a lot of pulls and luck to start.

"...The good started on the first pull. And did a good job on my driveway ran two tanks of gas though it about 4 hours running time...." Read more

"...I'm so SCARED of starting it every time, needs a lot of pulls and luck...." Read more

"This machine cranks easily and the pump works well." Read more

"...time you pull the rope, the pump builds pressure and makes it harder to pull the rope...." Read more

23 customers mention9 positive14 negative

Customers are mixed about the pump. Some mention that the cylinder was full of oil, the pump drained out of it all over the place, and the engine starts flawlessly. However, others say that the pump was faulty and sprayed foamy oil all over their pavers.

"...contacted the shop and said they wouldn't repair it due to chemical buildup...." Read more

"...Now, the machine. Honda engine, Cat pump, aluminum frame...can't complain about any of that.I will complain about a few things, however...." Read more

"...The 3rd seemed in better condition and the pump ended up being faulty. I finally saw other reviewers had the same complaints...." Read more

"...do it for work reasons, 6 months have passed and suddenly the water pump was used. 3 months ago I sent the guarantee that they provide by phone...." Read more

45 customers mention6 positive39 negative

Customers are dissatisfied with the warranty of the pressure washer. They mention that the product arrived damaged, with dents and scratches. Some customers also report that the frame had gotten bent and the handle wouldn't slide. They also say that the gas tank was slightly bent in and the wand handle was cracked to pieces.

"...anything wrong, but as soon as the courier left, I noticed the frame had gotten bent and the handle wouldn't slide on...." Read more

"...the outside of my package looked fine when it showed up, the wheels and frame were bent apparently from the inertia of the pump/motor continuing to..." Read more

"...As many other reviews have said, it did come damaged. Its literally a 130lb pressure washer in a cardboard box, so Im not sure what they expect...." Read more

"...the frame and axel are bent and the wheel has a hard indent in the rim and retention hardware was broken off...." Read more

Excellent pressure washer, Amazon service and delivery was 5 star!
5 Stars
Excellent pressure washer, Amazon service and delivery was 5 star!
Researched a new pressure washer for weeks. I looked at all sorts of online suppliers and Amazon had exactly the model with the engine I was looking at that matched my requirements.Delivery was fast, the pressure washer was in perfect condition and once I got the oil into the engine and gassed it up, the engine started on the first pull.The engine is shipped without oil but oil is included. The hydraulic pump has oil in it but be SURE to remove the small black plug from the center of the red hydraulic pump cover or you can damage the pump.I did have one issue on arrival that has been reported by other Amazon customers.See the photo of the wheel with the arrow pointing at the retainer clip. That clip came off almost instantly. I removed the axle and both wheels and used a triangular file to cut the notch in the axle a bit deeper on both sides to hold the retainer clip. Sloppy manufacturing on the part of Simpson.I’ve used a very similar but smaller version of this Simpson pressure washer for decades. Honda engine is the only way to go and the Cat pump has seal rebuild kits. The 5 pressure tips included cover most situations and pay attention to using the right tip for the right job.The 3400 psi model is ideal for most homeowner purposes including siding, concrete, and patio cleanup. NEVER point the water stream at skin, other people or animals. A 3400 psi water jet up close can cause severe tissue and damage skin in an instant. Wear work shoes with safety toes and eye protection.As a long time owner of machine exactly like this one there are a few things owners need to do to ensure quick starts and trouble free service. I read many low star reviews focused on hard starting. It’s not the machine, it’s the owner and their failure to follow some simple maintenance rules.This is key - ALWAYS run the fuel out of the carb when you’re done even if the machine will only sit for a few days. Use ethanol free gas with fuel stabilizer. Failure to use stabilizer and run the carb dry will cause 90% of hard starting problems.Change the engine oil and the hydraulic pump oil more often than required and use the proper oils. Check the air filter and the fluids regularly.I really like Simpson machines with Honda engines. I’ve had tremendous longevity and cleaning outcomes from these machines and I highly recommend them.
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Top reviews from the United States

Reviewed in the United States on February 12, 2024
Style: 3400 PSI Honda GX200Verified Purchase
Customer image
5.0 out of 5 stars Excellent pressure washer, Amazon service and delivery was 5 star!
Reviewed in the United States on February 12, 2024
Researched a new pressure washer for weeks. I looked at all sorts of online suppliers and Amazon had exactly the model with the engine I was looking at that matched my requirements.

Delivery was fast, the pressure washer was in perfect condition and once I got the oil into the engine and gassed it up, the engine started on the first pull.

The engine is shipped without oil but oil is included. The hydraulic pump has oil in it but be SURE to remove the small black plug from the center of the red hydraulic pump cover or you can damage the pump.

I did have one issue on arrival that has been reported by other Amazon customers.

See the photo of the wheel with the arrow pointing at the retainer clip. That clip came off almost instantly. I removed the axle and both wheels and used a triangular file to cut the notch in the axle a bit deeper on both sides to hold the retainer clip. Sloppy manufacturing on the part of Simpson.

I’ve used a very similar but smaller version of this Simpson pressure washer for decades. Honda engine is the only way to go and the Cat pump has seal rebuild kits. The 5 pressure tips included cover most situations and pay attention to using the right tip for the right job.

The 3400 psi model is ideal for most homeowner purposes including siding, concrete, and patio cleanup. NEVER point the water stream at skin, other people or animals. A 3400 psi water jet up close can cause severe tissue and damage skin in an instant. Wear work shoes with safety toes and eye protection.

As a long time owner of machine exactly like this one there are a few things owners need to do to ensure quick starts and trouble free service. I read many low star reviews focused on hard starting. It’s not the machine, it’s the owner and their failure to follow some simple maintenance rules.

This is key - ALWAYS run the fuel out of the carb when you’re done even if the machine will only sit for a few days. Use ethanol free gas with fuel stabilizer. Failure to use stabilizer and run the carb dry will cause 90% of hard starting problems.

Change the engine oil and the hydraulic pump oil more often than required and use the proper oils. Check the air filter and the fluids regularly.

I really like Simpson machines with Honda engines. I’ve had tremendous longevity and cleaning outcomes from these machines and I highly recommend them.
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3 people found this helpful
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Reviewed in the United States on June 18, 2017
Style: 4200 PSI Honda GX390Verified Purchase
Customer image
5.0 out of 5 stars 5 Star Performance, Zero Star Packaging
Reviewed in the United States on June 18, 2017
This is my first pressure washer and I wanted to get a good one. Sure, I could save some coin buying a lesser unit, but I didn't want to spend all weekend cleaning my driveway and patio. I'm glad I got the big one.

Mine was slightly damaged during shipping; more on that later.

After adding the included oil and filling the tank with fresh gasoline, I fed the pump some hose water and pulled the recoil starter. It fired right up, as a Honda should! I started off with the rotary head (rated for 4.0 GPM) and it immediately began to clear the scum from my driveway. The engine is well muffled for such a large displacement, by the way. The 50 foot hose is adequate for most residential needs, but adding a 100 footer to the accessories pile would help for cleaning off rockeries and brickwork around the backyard. This is the Evergreen State after all and moss is EVERYWHERE! Moss has met it's match with this unit, but I digress..

The 4500 PSI rated hose is of a 3/8" size, and it's burly but not too unwieldy; there is a price for power. I found the hose needs a bit of attention to deliberately lay out according to your intended cleaning path because loops and twists are not easily handled without setting down the wand, walking back to the problem and uncoiling it manually. Again, it's par for the course here.

The big Honda 390 pushes 4 gallons per minute with serious authority; it's easy to get cavalier with the wand but care must be used when getting close to wood as it will tear it up in no time flat, especially with a turbo head. Reducing the pressure and flow with the regulator on the wand proved invaluable around delicate structures and planter areas; I can't imagine using this machine without it.

I really love the aluminum base and frame. It's nice to know that it will never rust and weight has been kept to a minimum. As for the CAT pump, what's not to like? Industrial duty and rebuildable, it's the best money can buy. And when it comes to pressure washers, it's really all about the pump.

I can also say that if your plans for a pressure washer consist primarily of auto or boat washing, this unit is overkill extreme. An electric Karcher or similar machine would be much better suited to you. If you value your time as much as your money and want to spend more of it enjoying your property then cleaning it, this is the one to get!

Now about the damage. The courier that delivered the box to my house had noted that they received it with the cardboard already torn and plastic shipping wrap bandaging up the sad sight. A brief inspection didn't show anything wrong, but as soon as the courier left, I noticed the frame had gotten bent and the handle wouldn't slide on. I decided to just bend the post back in place enough to slide the handle on and live with it. Thankfully the engine proper didn't sustain any blows.

I've given the unit 5 stars because I think it deserves it, but Simpson has got to do something about their packaging. It's totally inappropriate to ship a 1300 dollar 125 pound machine in a 2 dollar single corrugated cardboard box. The machine was essentially swimming in a paper sack by the time it made it to my driveway. The wand and tube were simply dropped in the box without any extra protection and the fact that they weren't damaged or missing is nothing short of a miracle.

In summary, I would say that if you order one of these, you're rolling the dice when it comes to damage. Be prepared to refuse the shipment or hassle with aftermath from a significant impact.
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114 people found this helpful
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Reviewed in the United States on January 7, 2024
Style: 3400 PSI Honda GX200Verified Purchase
2 people found this helpful
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Top reviews from other countries

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Beaman
5.0 out of 5 stars Workhorse
Reviewed in Canada on April 15, 2022
Style: 3400 PSI Honda GX200Verified Purchase
Northern Bear
5.0 out of 5 stars Powerful, reliable and easy to use
Reviewed in Canada on May 22, 2019
Style: 3600 PSI Honda GX200Verified Purchase
9 people found this helpful
Report
pierre
5.0 out of 5 stars tres bonne machine tres performent
Reviewed in Canada on September 13, 2021
Style: 3400 PSI Honda GX200Verified Purchase
Duksey12
5.0 out of 5 stars Works as advertised
Reviewed in Canada on May 12, 2021
Style: 3600 PSI Honda GX200Verified Purchase
Mukhailo
5.0 out of 5 stars very good
Reviewed in Canada on April 18, 2022
Style: 3400 PSI Honda GX200Verified Purchase