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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 461-470 of 487 reviews
Dec 11, 2025
Cousin Vinny
5 out of 5 stars review

Great Washer!

This washer exceeds my expectations. It's an excellent product! Thank you!!!

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Oct 16, 2025
Nate80
5 out of 5 stars review

great model

I bought this a week ago! Runs great! Great pressure washer for a start up

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

It's great to hear you've enjoyed a smooth & powerful performance, & your 4200 PSI pressure washer has delivered a five-star cleaning experience, Nate80. Show off your work any time by tagging #simpsonclean on social media & we'd love to see photos of your projects. Thanks for the feedback!

Dec 29, 2025
Qlake
5 out of 5 stars review

Super Powerful

This is a very powerful power washer and I highly recommend it.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Jan 4, 2026
Bdoe
5 out of 5 stars review

Well built

This is a well built high quality machine. Best bang for you buck in the 4000psi + washer.

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

We're glad you've been impressed with the quality build of your Simpson pressure washer, & you've enjoyed a five-star performance with plenty of power to suit your needs. Thanks for the positive feedback, Bdoe!

Nov 10, 2025
Clem1982
5 out of 5 stars review

Works great

I bought this power washer about a week ago and so far it has been working great

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

It's great to hear you've enjoyed an excellent performance from your new 4200 PSI pressure washer, Clem1982. Show it off any time by tagging #simpsonclean on social media with your before/after photos & we'd love to see it at work. Thanks for the positive feedback!

Jan 29, 2026
Nismo
5 out of 5 stars review

Excelente

Esta máquina tiene mucha presión y funciona muy bien.

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

We're glad you've enjoyed a flawless performance with plenty of power. Enjoy your new Simpson pressure washer, Nismo!

Feb 7, 2026
Gierke69440
5 out of 5 stars review

Very nice washer

Very well made, sturdy, haven’t used yet , middle of winter but look forward to cleaning

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

We're glad to hear you've been impressed with the rugged build & look forward to hearing how you enjoy the powerful performance of your new Simpson pressure washer. Enjoy that machine, Gierke69440!

Sep 29, 2025
Anonymous
1 out of 5 stars review

Just purchased today 9-29-2025.

[This review was collected as part of a promotion.] Just purchased as of today 9-29-2025. To be reviewed later..

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

We look forward to the update, Ron Cooper! Enjoy that machine!

Mar 29, 2019
Landscapepro
5 out of 5 stars review

1 year review

I got this as a residential model for cleaning bare concrete. It’s beyond powerful enough. For the price, you will not find more cleaning power. If your looking for a washer to regularly use on a car, I would suggest something with less power, this has taken small bits of paint off of my car.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Jul 7, 2020
ciro
4 out of 5 stars review

Great machine with a couple of flaws.

I've had this machine for only a week and only 1 hour and 20 minutes of run time on the hourmeter I installed, so this review is only an initial assessment. The machine is a beast and not for the frail, it's heavy, the monster hose needs to be rolled, not lassoed, and the recoil from the pressure is a good 30 pounds, so be prepared to get a good workout in. Otherwise, besides it's few flaws, I love it. I ran it at 2750 rpms on the first use to break it in and really, that's more pressure and volume than most other machines put out at full power, and at that rpm the engine sounds like it's just cruising along rather than screaming. The one major flaw is the pressure release valve installed on the pump, when you shut the machine down it sometimes squirts cold water on a very hot engine resulting in a cloud of steam and the engine complaining with all sorts of crackling sounds from the sudden and unequal contraction on one side of the cylinder wall. I solved the flaw with a rubber elbow and a stainless hose clamp, something Simpson could do for pennies. The other issue is the grab handle that goes over the engine, it doesn't fit squarely against the other handle and I had to leave it off.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122