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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
stars
593 ratings579 reviews
  1. 5 stars81% (483)
  2. 4 stars13% (77)
  3. 3 stars1% (8)
  4. 2 stars1% (3)
  5. 1 star4% (22)

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Showing 551-560 of 579 reviews
Mar 7, 2026
MD173
5 out of 5 stars review

Just purchased

I just purchased and haven’t had a chance to use yet. Seems like a very heavy duty pressure washer.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Jan 21, 2026
JohnJohn
5 out of 5 stars review

Great machine

Easy to use, the flow of the water is great to remove dirt and debris.

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

We're glad to hear your Simpson pressure washer has proven easy to use & it's delivered plenty of power to suit your needs. Thanks for the positive feedback, JohnJohn!

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!

Dec 5, 2025
DDKMc
5 out of 5 stars review

Nice and heavy duty

I think this machine will be just fine. Nice and heavy duty.

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
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
Mar 14, 2026
Neliebuck
5 out of 5 stars review

4400 psi pressure washer

So far it is a great product! Very well put together and has great parts

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
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!

Apr 22, 2018
KeithGB
5 out of 5 stars review

Powerful!

I bought this on April 17, 2018 and very glad I did! I've used it only once for a couple hours on my sidewalk and driveway and man does it have power and do an awesome job in a short time!!! All my neighbors are wanting to hire me and my new toy out! Lol

Review from simpsoncleaning.com
Helpful?4LDY3BT2CMUR13758761122
Oct 29, 2017
JimBob
5 out of 5 stars review

Perfect for the Shop

To date this is my second Simpson machine in a year. The first one I bought was for my home and after how great it worked I decided to buy another unit for my business. I own a small car repair and oil change shop. I wanted something that had plenty of power to help get rid of oil stains but also didn't break my bank seeing as that I am a small business. Simpson created the perfect model on this one. Tons and I mean tons of power and at the most competitive price in the market. I only use it about once or twice a week for an hour or so but its been perfect. 2 Simpson pressure washers in and I love the product and the brand.

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