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Simpson ALH4240 Review: A Powerful Commercial Cleaner

Simpson ALH4240 is a powerful machine that can help you clean your home or business quickly and easily.

The pressure washer features a durable Honda engine that provides ample power to do the job.

It also has a detergent injection system that allows you to use detergents or cleaners to break down tough dirt and stains.

The ALH4240 is easy to operate and contains various attachments for all your cleaning needs.

A 3-year warranty also backs it, so you can be sure it will last for years.

Simpson Cleaning has always been a trusted name in pressure washers. With the Simpson ALH4240, they have created a powerful commercial-grade cleaner perfect for cleaning schools, hospitals, or other large areas.

This machine features a high CU rating and plenty of power, but it does lack storage space on the chassis. We take a look at the pros and cons of this machine below.

Let’s dive into the Simpson ALH4240 Review!

BrandSimpson Cleaning
Power SourceGasoline
Item Dimensions LxWxH38 x 23.5 x 29 inches
Maximum Pressure4200 PSI
Item Weight124 Pounds
Hose Length50 Inches
Maximum Flow Rate4 GPM
  • The Pressure Washer Unit
  • Five quick-connect nozzles of varying angles (0°, 15°, 25°, 40°, and a soap-compatible detergent nozzle).
  • The 50-foot hose is steel-braided, which prevents kinking and abrasions.
  • An on-board accessory storage system helps keep all your accessories and attachments in order.

Note: Unfortunately, this pressure washer has no hose reel included in the box. 

Why Choose Simpson Brand

– Simpson has 60 years of experience in the industry, and this is reflected in their products

– Simpson offers solutions for everyone, from those who are just starting to those who have been pressure washing for years

– Simpson has a wide range of accessories and replacement parts available to extend the life of your machine.

– Simpson products are designed to be durable and easy to use. Simpson also offers a wide range of customer support options.

Reason to Buy Simpson ALH4240

Robust Engine: Simpson ALH2440 is equipped with a Honda GX390 engine that provides 13 HP. The Simpson pressure washer also has an oil alert system.

CAT Pump: The pressure washer has a CAT industrial triplex plunger pump that offers four gallons per minute flow rate. This pump is also very durable, as it’s made with ceramic plungers and stainless steel valves.

Non-marring Hose: The Simpson pressure washer comes with a kink and abrasion-resistant non-marring hose. This hose is also 50 feet long, so you’ll have plenty of reach when using this machine.

Quick Connect Nozzles: The Simpson ALH2440 has five fast connect nozzles, so you can easily switch between different cleaning jobs. It is an excellent feature if you need to clean multiple surfaces.

Durable Built: The Simpson pressure washer is made with an aircraft-grade aluminium frame that prevents corrosion. This machine is also built with pneumatic tires that offer easy maneuverability.

Keep In Mind

Lacks Storage Space: One downside of the Simpson pressure washer is that it lacks storage space on the chassis. That means you’ll have to find a place to store the hose and cords when not in use.

Expert Verdict

Overall, the Simpson ALH2440 is a powerful commercial-grade pressure washer that is perfect for cleaning large areas. It features a robust engine, durable pump, and long reach hose.

However, it does lack storage space on the chassis. Nevertheless, if you’re looking for a powerful pressure washer that can handle any job, then the Simpson ALH2440 is an excellent option.

What is the Ideal Customer Profile for This Product?

The Simpson ALH4240 is advertised as explicitly made for a commercial cleaning expert.

Contractors who specialize in deck cleaning, graffiti removal, vehicle washing, and other services may find a very strong clean beneficial.

The materials and components used to create this item have been tested and proven in the commercial sector, withstanding damp and weather in hostile conditions while preserving its shape.


Can I use hot water in my Simpson pressure washer?

Answer: No, only use the cold-water hose bib or spigot on your house with the pressure washer. Hot water will damage the pump on your pressure washer.

How long can you run a Simpson pressure washer?

Answer: Simpson pressure washers are designed to be run for 3 to 5 minutes maximum. Running them for longer than this can overheat the engine and damage it.

Any Safety Tips for the Simpson pressure washer?

Answer: It’s also important to note that you should never point a pressure washer at someone or something you don’t want to be blasted with high-pressure water–the stream can cause serious injury.

So always be careful when using a pressure washer, and read the manufacturer’s instructions carefully.

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Last update on 2024-05-15 / Affiliate links / Images from Amazon Product Advertising API

Last update on 2024-05-15 / Affiliate links / Images from Amazon Product Advertising API

Picture of Z Hashan

Z Hashan

I’m Z Hashan, an entrepreneur, but more importantly (well, to me at least), a tool head. I’m passionate about all sorts of machines and how they work – it’s in my blood.

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