Simpson 4400 PSI at 4.0 GPM AAA Industrial Triplex Pump Kit - 90034

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Simpson 4400 PSI at 4.0 GPM AAA Industrial Triplex Pump Kit - 90034
Simpson 4400 PSI at 4.0 GPM AAA Industrial Triplex Pump Kit - 90034
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Simpson 4400 PSI at 4.0 GPM AAA Industrial Triplex Pump Kit - 90034

2.3 stars out of 3 reviews
(2.3)|
3 ratings

Key item features

  • Extended Lifespan: Extend the life of your pressure washer by replacing the pump instead of buying a new unit. Suitable for washers supporting 4400 PSI at 4.0 GPM.
  • Simple Installation: Features a garden hose inlet and QC quick connect high pressure hose outlet. Includes siphon tube with filter, mounting bolts, shaft key, and instruction booklet.
  • Adjustable Pressure: PowerBoost Technology delivers higher pressure at the nozzle. Hand turn knob allows for easy pressure adjustment for various tasks.
  • Oil Monitoring: Sight glass and advanced oil seal technology provide visibility to oil levels, eliminating the need for a dipstick.
  • Compatibility: Designed for gas-powered pressure washers with horizontal engines. SAE bolt pattern and standard connections fit many brands and models.
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2.3 out of 5 stars
stars3 ratings3 reviews
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Showing 1-3 of 3 reviews

Nov 5, 2024
FDELREAL
5 out of 5 stars review

WORKS GREAT

THE PUMP IS INSTALLED ON A SIMPSON UNIT AND HAS BEEN WORKING VERY WELL.

Review from simpsoncleaning.com
Helpful?2UPCNWOJ9L89796641209
reply from Simpson Team

It's great to hear your pump kit was just the part you needed for your existing unit & it has been delivering an excellent performance. Thanks for reviewing, FDELREAL!

Sep 8, 2025
$$$$$
1 out of 5 stars review

Pump Sucks!

These pumps suck! I've gone through 3 in 30 days. The seals fail, the lube oil turns into an emulsion, then the shaft disintegrates.

Review from simpsoncleaning.com
Helpful?2UPCNWOJ9L89796641209
reply from Simpson Team

This certainly isn't what we expect to hear & we're sorry to hear about the issues you encountered with your pumps. If you would give our team a call at 877-362-4271 or email us at productsupport@simpsoncleaning.com, we hope to learn more about what happened with these units & explore ways to improve your experience as quickly as possible. We appreciate you sharing this feedback & hope you will be in touch soon!

Aug 7, 2024
buzsaw
1 out of 5 stars review

Experienced pressure washer

I used the machine about 10 or 12 hours and the pump had a problem. It was replaced under warranty. Next spring the unloader valve is sticking.

Review from simpsoncleaning.com
Helpful?2UPCNWOJ9L89796641209
reply from Simpson Team

This is not the performance we expect buzsaw, and we're sorry to hear about the unloader valve. Would you please give our team a call at 877-362-4271 or email us at productsupport@simpsoncleaning.com? We hope to learn more about what happened and determine the fastest solution to improve this performance so you can get up and running smoothly again. We appreciate you taking the time to share this experience and hope to hear from you very soon.