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Customer reviews for SIMPSON PowerShot 4400 PSI at 4.0 GPM SIMPSON 420cc Gas Pressure Washer for
SIMPSON PowerShot 4400 PSI at 4.0 GPM SIMPSON 420cc Gas Pressure Washer
4.7 out of 5 stars
stars501 ratings487 reviews
  1. 5 stars81% (405)
  2. 4 stars13% (66)
  3. 3 stars1% (7)
  4. 2 stars1% (3)
  5. 1 star4% (20)

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Showing 1-10 of 487 reviews
Jun 7, 2026
Alan Burton
5 out of 5 stars review

Verified Purchase

A rock solid pressure washer

[This review was collected as part of a promotion.] As soon as I unpacked my pressure washer it was obvious that it was constructed from quality materials. Everything about it looked solid and well built. I'm certain I will get years of service out of this machine with proper maintenance. It's everything I expected and more.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
May 22, 2026
Dada
5 out of 5 stars review

Verified Purchase

Strong

[This review was collected as part of a promotion.] I recently purchased and the pressure washer has been a strong great machine with excellent cleaning power. I recommend.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
May 30, 2026
Seanzb
5 out of 5 stars review

Verified Purchase

Running smooth

[This review was collected as part of a promotion.] Just bought it about a week ago and used it for cleaning a deck and driveway. Works great and plenty of pressure.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
May 20, 2026
PS 4240 review
4 out of 5 stars review

Verified Purchase

Well built machine with plenty of power

I purchased my PS 4240 last week. I am very impressed with the power it provides and the easy set up. It is very sturdy and well built. It's a little heavy for my liking but not a big deal. The only issue I have found is that I have to turn the unit off to switch tips in the wand.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
May 11, 2026
JBElectric
4 out of 5 stars review

Verified Purchase

Powerful Pressure Washer!

[This review was collected as part of a promotion.] This thing is definitely a beast! Have to be careful not to take off more than you want with it. Seems very heavy duty and well made. Hoping for lots of years of life and service out of it! It is fairly weight forward, so need to pay attention so it doesn't end up on its nose, but if using on level ground, this is pretty easily done.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Apr 25, 2026
BigCountry
4 out of 5 stars review

Verified Purchase

Great machine!

The engine and pump are awesome the hose it comes with is lacking and leaves marks. The gun is lacking it works fine but feels a bit flimsy in the hand. The pressure rating is a bit high at 4gpm I have played with it I get 4gpm at around 3400psi. The packaging needs some support foam to keep from damage my unloader valve was bent upon arrival along with a couple dents in the fuel tank and heat shield. I use an external unloader valve and I dont mind a few dents. Thats the reasoning for 4 stars instead of 5.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
May 31, 2026
Ben11
3 out of 5 stars review

Verified Purchase

CHEAP SPARK PLUG

Starting off I could not crank the washer.....After the tenth pull and it was still not firing...I took out the Spark Plug,,, I found that the GAP WAS CLOSED. so I set the gap and pulled again. Started to fire then back fired... Then no fire...Reset the plug... Cranked right up... Did a Great Job on cleaning concrete with the Whirie....Since then, I have replaced the plug..........For the cost of the machine,,,you CHEAPEDOUT on the spark plug......

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
reply from Simpson Team

Hello, Ben11. This certainly isn't normal & we appreciate you bringing the condition of the spark plug to our attention. We're glad you were able to resolve the issue & have since enjoyed a smooth performance. We will be sure to document your experience for our records - thanks for taking the time to review!

Apr 24, 2026
Mikey D
1 out of 5 stars review

Verified Purchase

Horrible

I just bought this pressure washer and I’ve been trying to get in touch with someone because it has multiple issues….. The chemical injector doesn’t work, the unloader valve cap/pressure regulator cap has popped off twice which isn’t supposed to happen. This product is supposed to be the best on the market and I can’t tell. Horrible experience.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
reply from Simpson Team

Hello, Mikey D. This isn't the experience we strive for & we're sorry to hear about the condition of this unit. Try reaching out to our team directly at 877-362-4271 or email us at productsupport@simpsoncleaning.com, and we hope to determine how to get the issues with the injector & unloader valve resolved as quickly as we can. Thanks for sharing this valuable feedback & we hope to be speaking with you very soon!

May 2, 2026
Axle pin
1 out of 5 stars review

Verified Purchase

Axle.pin issue

Arrived with pin missing from the axle so the wheel now falls off. I now can't really use it at all. The axle pin is actually a dumb idea and has not stopped me dead in my tracks. Now I have to take time to call the manufacturer to get the part. Not happyat all.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
reply from Simpson Team

Hello, Axle pin. This certainly isn't the experience we strive for, & we appreciate you alerting us to the missing pin. We look forward to getting this issue resolved so you can enjoy your machine as quickly as possible. Thanks for taking the time to share this feedback.

Jun 4, 2026
Don73
1 out of 5 stars review

Verified Purchase

Haven't been able to use yet due to issue

Engine had issue with excessive fuel filling cylinder flooding and causing hydrolock. Took unit to local authorized repair shop and waiting to hear back.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
reply from Simpson Team

Hello, Don73. This performance certainly isn't normal, & we're sorry to hear about the hydrolock. We hope the problem is resolved quickly & easily so you can start enjoying the performance of your machine as soon as possible. Please don't hesitate to contact our team at 877-362-4271 or email us at productsupport@simpsoncleaning.com if we can assist through the process. Thanks for taking the time to share your feedback!