Simpson Pressure Washer Reviews – Buying Guide

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Simpson Pressure Washer Reviews – Buying Guide
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Dealing with your house siding, car, or a mossy covered patio can be a chore, even more so if you try to clean these with your own strength and regular cleaning tools. Thankfully we have some fantastic pressure washers from the Simpson cleaning company.

Simpson cleaning company has produced some impressive pressure washers, pressure washers which dirt, mold, and grime fear. Turning the chore of keeping your yard clean into a job you can enjoy…, one done in a matter of minutes rather than hours.

With these Simpson pressure washer reviews that I’ve put together, hopefully, you’ll be able to make a purchase based on an informed choice and hopefully, you’ll walk away with the best Simpson pressure washer for your requirements.

SIMPSON Cleaning WS5050H WaterShot Gas Pressure Washer Powered by Honda GX630, 5000 PSI 5.0 GPM

Simpson Cleaning WS5050H

  • Weight: 344 Pounds
  • Dimensions: 48.5 x 28 x 27 inches
  • Pressure: 5000 psi
  • GPM: 5 gallons
  • Cleaning Power: 25000
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SIMPSON Cleaning PS4240 PowerShot 4200 PSI Gas Pressure Washer, 4.0 GPM, Honda GX390 Engine, Includes Spray Gun, 5 QC Nozzle Tips, 3/8-inch x 50-foot Monster Hose, (49-State)

Simpson Cleaning PS4240H

  • Weight: 141 Pounds
  • Dimensions: 37 x 24 x 27 inches
  • Pressure: 4200 psi
  • GPM: 4 gallons
  • Cleaning Power: 16800
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SIMPSON Cleaning MSH3125 MegaShot 3200 PSI Gas Pressure Washer, 2.5 GPM, Honda GC190 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 1/4-in. x 25-ft. MorFlex Hose, (49-State), Black

Simpson Cleaning MSH3125-S

  • Weight: 65 Pounds
  • Dimensions: 34.7 x 21 x 23.2 inches
  • Pressure: 3200 psi
  • GPM: 2.5 gallons
  • Cleaning Power: 8000
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Best Simpson Pressure Washer Reviews

SIMPSON Cleaning WS5050H WaterShot Gas Pressure Washer Powered by Honda GX630, 5000 PSI 5.0 GPM SIMPSON Cleaning WS5050H WaterShot Gas Pressure Washer Powered by Honda GX630, 5000 PSI 5.0 GPM
  • Honda GX630 engine W/ oil alert
  • Comet industrial Triplex plunger pump
  • 3/8 in. X 50 ft. Monster hose is non-marring, kink and abrasion resistant and equipped w/ quick connect fittings
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The Simpson WS5050H is powered by a 20-Horsepower (HP) Honda GX620 V-Twin Electric start engine. This engine is a beast of a machine, producing 5000 PSI and 5GPM, that’s a cleaning power of 25000.

No dirt is going to withstand this machine. Want to strip paint? Consider it done, graffiti removal? Done. It has a label on the side which says “Water Shotgun” and that’s no joke, this thing obliterates dirt.

Being a gas-powered pressure washer, you’ll never be limited by a power cord length.

I must caution you, with a pressure washer producing this much power it is firmly aimed at professional use, it directed at any fragile surface, well that surface won’t exist for long.

You get a 50 foot-long industrial high-pressure hose, a remote 6-gallon poly fuel tank, that’s built to last, job after job.

5 quick-connect nozzles and a belt-drive system which ensures the longevity of your engine and pump, it’s powerful and efficient made with professional quality parts.

This is all mounted on a 10-gauge heavy-duty steel frame and comes with a 10-year warranty, though the warranty of the individual parts varies, however.

For such a large model, this can be assembled fairly quickly.

I love the 13-inch premium tires on “MAG” wheels, which allow you to move this unit over any terrain. This isn’t the lightest of machines coming in at 344 pounds, so strong and capable wheels are a necessity.

Naturally, this Simpson power washer with impressive features comes with an equally impressive price tag.

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SIMPSON Cleaning PS4240 PowerShot 4200 PSI Gas Pressure Washer, 4.0 GPM, Honda GX390 Engine, Includes Spray Gun, 5 QC Nozzle Tips, 3/8-inch x 50-foot Monster Hose, (49-State) SIMPSON Cleaning PS4240 PowerShot 4200 PSI Gas Pressure Washer, 4.0 GPM, Honda GX390 Engine, Includes Spray Gun, 5 QC Nozzle Tips, 3/8-inch x 50-foot Monster Hose, (49-State)
  • Professional Performance: Easy-to-assemble and easy-to-start with its Honda GX390 premium engine, the PowerShot power washer is great for contractors who specialize in deck cleaning, wood restoration,...
  • Power and Durability: A powerful, reliable, maintenance-free AAA industrial triplex plunger pump delivers 4200 PSI at 4.0 GPM and includes thermal relief to prevent overheating
  • Sturdy and Portable: The welded steel frame construction with powder coated finish offers durability and corrosion resistance; 13-inch premium pneumatic tires deliver ease of maneuverability across...
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This is another punch Simpson pressure washer. The PS4240H is powered by a GX390 engine, and a AAA Industrial Triplex plump, which is considered to be one of the most durable pumps available to pressure washers.

The combination of these two produces a PSI of 4200 at 4.0 GPM, that’s an overall cleaning power of 16800. There isn’t much that will withstand that sort of force.

This is the type of cleaning power that will take a dirty driveway, the ridges of your winter tires, and sidings filled with mold in a single spray from the spray lance.

The wand of this pressure washer has been specifically designed to be ergonomically friendly, which is excellent if you’ve ever spent any lengthy duration using a pressure washer you’ll know how tiring it can be on your hands.

The PS4240H comes with a 50 foot-long hose with allows you to reach every nook and cranny without having to move the pressure washer around, increasing the mobility of the unit. It just makes sense to include these lengthy hoses with such power and heavy units.

Everything is mounted on a heavy-duty steel frame that’s been powered coated against corrosion and abuse. Fortunately, this frame is attached to two 13-inch pneumatic tires, so even though this pressure washer comes in at 141 pounds, it can be easily moved around by a single person.

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The trusty Simpson Megashot, this is the lightweight among the other Simpson offerings on this list, coming in at only 65 pounds.

It’s been designed for residential purposes. It’s powered by a Honda GC190 engine and a maintenance-free axial cam pump which produces 3200 PSI at 2.5 GPM; this gives you a cleaning power of 8000. Now, this may have the lowest cleaning power on this list. But don’t let that fool you. This is the most versatile gas-power pressure washer on this list.

This is a pressure washer that you can use on any type of surface, whether it be windows, any type of floor, patios, furniture, preparing the house before it is painted, roof clean-up, and so on.

This is a compact unit, with two heavy-duty wheels on 10″ Premium pneumatic tires. Due to its compact size, you can easily store the MSH3125-S in your shed or garage.

It comes with 5 quick connect nozzles, so you have a wide variety of choices to choose from for your cleaning needs.

Although your axial cam pump is maintenance-free, you still need to make sure that the pump is lubricated, you still need to winterize your machine to ensure safe and proper usage in the future. That means adequate maintenance and storing before the winter.

Should you buy this pressure washer, here’s an unboxing video to tide you over until yours arrives.

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What You Need To Know About Simpson Pressure Washers?

The Simpson cleaning company has invested over 50 years into the design and manufacture of cleaning solutions.

During this time where they’ve designed products for professional and residential use, their main focus as a North American company is in the making of gasoline-powered and heavy-duty cleaning machines for the entire US market.

These gas-powered models that I’ve shown you today in these Simpson pressure washer reviews can and should be used for serious cleaning jobs and for cleaning businesses. From cleaning trucks to preparing houses for paint jobs. There really isn’t a cleaning task that you can’t tackle with one of these machines.

About Simpson Cleaning

Simpson Cleaning has been solely focused on cleaning solutions during their 50 years in the industry. While they started in North America, in 2006, they were acquired by the FNA Group Inc. The FNA brand also includes companies that produced various parts use within the Simpson cleaning pressure washers. Companies such as AAA Pumps, PowerWasher, OEM Solutions and others.

By joining the FNA group, Simon cleaning was able to expand their production and sales to cover the entirety of the United States of America.

As Simpson Cleaning has progressed, both their do-it-yourself and cleaning professionals have continued to follow and support this brand of pressure washers.

Guarantees And Return Policies

Simpson has a range of parts and returns policies regarding their machines.

Their frames have the most prolonged warranty period, going all the way up to 10 years in length for their most expensive models and 5 years for the less expensive ones.

Some of their Honda engines have special warranties, some of which can be extended. This extended policy adds an additional 2 more years on top of the regular warranty period. If you don’t extend then you get the standard 2-3 year warranty.

The pumps and some of the valves come with a similar warranty as the engines, though Simpson Cleaning can be a little nit-picky over precisely what they’ll cover.

Components such as Hoses, nozzles, and other smaller parts that are easily replaced fall under a much shorter warranty period.

If you do, unfortunately, encounter a problem with your Simpson pressure washer, all you have to do is call up their help center and locate your closest servicing branch. Though make sure to take your pressure washer to one of their official service centers, if the pump or the engine gets opened by someone who is not a registered repair provider, it will invalidate any and all warranties that you have.

Once the problem has been identified by someone at a registered repair provider, it may take a couple of weeks for your pressure washer to get repaired since Simpson have to send a replacement part to the repair facility. While this may seem bothersome, Simpson manufactures all their own parts for their machines and you want Simpson original parts as they work best with their pressure washers.

Simpson Power Washer Comparison Chart

Simpson Cleaning WS5050H34448.5 x 28 x 27 5000 5 25000
Simpson Cleaning PS4240H 14137 x 24 x 27 4200 4 16800
Simpson Cleaning MSH3125-S 65 34.7 x 21 x 23.2 3200 2.5 8000

Wrap Up

Simpson Cleaning, thanks to the quality of their machines, has managed to maintain a steady client base, which is apparent seeing as they have been in business for so long.

They design and manufacture durable, heavy-duty cleaning machines. These machines are so well designed that customers remain customers for a long time.

The fact that Simpson Cleaning was acquired by the FNA group, which is known as a powerhouse in the pressure cleaning industry, just supercharged their growth, and only goes to prove the quality of their service and products.

I’ve covered the most sought after units in these Simpson pressure washer reviews, hopefully saving you time in your research, if you have any questions please ask them in the comments below, I genuinely want you to find the best cleaning unit for your needs.

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Adam White is the founder and chief editor at He has years of experience from years of Gardening, Garden Design, Home Improvement, DIY, carpentry, and car detailing. His aim? Well that’s simple. To cut through the jargon and help you succeed.

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