Free Shipping On Pressure Washers (Lower 48) Tax-Free Except Illinois Orders
Welcome | Sign In or Contact Us
Your Cart @ Pressure Washers Direct Cart:
Quick Search
531
Pressure Washer Models

CAT Pumps 3000 PSI 2.7 GPM Replacement Triplex Plunger Pressure Washer Pump w/ Adjustable Unloader

Close
Cat Pumps Pressure Washers and Accessories
Model: 4PPX30GSI
(Based on expert analysis, manufacturer ratings and customer reviews)
4.1 out of 54.1 out of 54.1 out of 54.1 out of 54.1 out of 5
20 Reviews
Share This Product
Plus 1 This Product
Tweet This Product
Pin It!
Factory DirectFactory Direct
Ships in 2-5 Business Days

Factory items ship direct from the manufacturer. Shipping times vary.
$249.99

StoreShippingPriceShop
 
$249.99
No Sales Tax*
(Except IL)
Buy
 
$249.99
No Sales Tax*
(Except IL)
Visit Site
  • Features
  • Specs
  • 3
    Q&A 
  • 20
    Reviews
  • Articles
  • Shipping
  • Accessories
Grade
Style
Inflow
3/8
3/8" Threaded (Female)
Outflow
3/8
3/8" Threaded (Male)
CAT Brand Triplex Plunger Replacement Pump
Durable & long lasting; advanced design for smooth liquid flow
3/8" NPT female inlet, 3/8" NPT male outlet; 140F maximum water temperature
This is a bare pump; you will need to re-use your current fittings or purchase new ones (sold separately)

Concentric Solid Ceramic Plungers
Ceramic runs cooler, lasts longer; assures true wear surface
Specially formulated seals deliver extended seal life

Stacked Valve Design
Makes servicing easy
0.280 stroke; 0.551 bore; requires 8.5 oz. pump oil

Ultra-Compact 3/4" Hollow-Shafted Pump
Designed for direct mounting to gas engine

Integral Pressure Unloader
Standard built-in bypass controls pressure & protects the pump

1/4" Fixed Chemical Injector Hose Barb
Allows addition of pressure washer safe soap to the water flow

Be Sure To Measure Shaft & Flange Bolt Holes Accurately!
There is a 25% restock fee on returned pumps
See the Owner's Manual (under the Specs tab) for dimensions


Accessories
Accessory Grade
Prosumer
Accessory Style
Gas
Inflow
3/8" Threaded (Female)
Outflow
3/8" Threaded (Male)
Rated PSI
3000 PSI
Overview
Weight
10.7 Pounds
Product Length
8.03 Inches
Product Width
7.83 Inches
Product Height
6.61 Inches
Consumer Warranty
2 Years
Model
4PPX30GSI
Subject: Store ID: Product ID: Data Category: Brand Category:

*Ask Brian about the Cat Pumps 4PPX30GSI. Sorry, no repair questions:


*Name:


*State:


*Email: 


 Receive Weekly How-To Tips & Specials 


*Required Field Submit
  3 Questions
Q: Mike
I have a Troy Built 6.75 HP (model 01904). Would this pump be a good replacement for it? Do you have any other recommendations? We use it just around the house and barn so it's not used a lot but at times can run for several hours on a job.
Thanks

by Charles Randall from Michigan on June 11, 2015

A: Please confirm you have a 3/4" hollow engine shaft. This would be a great pump, however I do recommend the fully plumbed version so it comes with the inlet and outlet fittings, unloader, thermal relief valve, and siphon hose. This way you just need to take off the old pump, slap this one on and you are ready to go!

Fully Plumbed Pump
by Brian, Product Expert
Q: 3/4 in shaft by what length?.Is the mounting bolt pattern regular 2.5 in square,these are the mosssst important things you should advertise!!!,NOT the rest of the garbage
by Nathan Raghu from Louisiana on June 02, 2015

A: There are multiple locations this pump can bolt on. What brand engine do you have? This will bolt up to any 3/4" horizontal engine shaft, that was produced in the last 10 years.
by Brian, Product Expert
Q: can I put a 3000 psi pump on 4hp motor
by Paul Lemoine from Louisiana on March 02, 2015

A: No, you will need to attach this to a 6.5 HP engine or larger. We do not have a triplex plunger pump compatible with a 4 HP engine.
by Brian, Product Expert
Cat Pumps 4PPX30GSI Reviews & Ratings
Overall Rating
Features
4/5
Quality
4/5
Performance
4/5
Value
4/5
Overall
4.1 out of 54.1 out of 54.1 out of 54.1 out of 54.1 out of 5
Pros
I'd Buy It Again (3)
Easy To Use (1)
Price (1)
High Quality (1)
Exceeded Expectations (1)
Cons
Incomplete Machining On ... (1)
Bad Instructions (1)
Difficult To Use (1)
Expensive (1)
Packaging (1)
78% of respondents would recommend this product to a friend
20 Reviews  Sort by 
 
Mark Rought
Chino Hills, CA
Purchased from Pressure Washers Direct
Purchased 8/23/17
Most Helpful Positive Review
REVIEWED
AUG.
30
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Very Happy
I replaced my outdated 3DX29GSI with the 4PPX30GSI.. received it on time.. bolted in on/ adjusted the Unloader and it worked better than new. very happy with the pump and with Pressure Washers Direct...thank you Brian...
Pros: Durable, Exceeded Expectations, High Quality, I'd Buy It Again
Mark Recommends This Cat Pumps Product
Was this review helpful?
01
William W.
Bronson, FL
Purchased from Pressure Washers Direct
Purchased 11/27/16
Most Helpful Critical Review
REVIEWED
JAN.
10
2017
2 out of 52 out of 52 out of 52 out of 52 out of 5
Not Satisfied
At this moment completely unsatisfied . Pump seems to be defective and in phone conversation with Pressure Washers Direct they are not accepting responsibility or standing behind the sale.
Cons: Packaging, Expensive
William Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
William,
I'm sorry you aren't happy with your purchase. This pump ships directly from the folks at CAT, and CAT supplies the warranty. That's why, when you told us you were missing parts from the pump, we asked you to contact CAT directly so they could ship you anything that was missing from their box. We don't have the bits-and-pieces here.

Our records show that when you gave us a call after your purchase we also explained that this is a bare pump, meaning you would need to reuse your own fittings or purchase new fittings (sold separately). Usually CAT does a great job helping our customers, but if the folks at CAT aren't treating you properly then please let us know; we are happy to work with our CAT sales rep to straighten things out.

For those reading this review, fully-plumbed pumps can be found here. They can make the installation process easier.
more
Was this review helpful?
11
Scott N.
Elk Grove, CA
Purchased from Pressure Washers Direct
Purchased 8/25/17
REVIEWED
SEP.
20
2017
4 out of 54 out of 54 out of 54 out of 54 out of 5
Good Choice For A Replacement
It installed with ease. This pump got mounted on the Harbor Freight Honda Clone (6.5hp). Fit perfect.
Pros: I'd Buy It Again
Scott Recommends This Cat Pumps Product
Was this review helpful?
00
Daniel D.
Hialeah, FL
Purchased from Pressure Washers Direct
Purchased 2/19/17
REVIEWED
MAR.
14
2017
1 out of 51 out of 51 out of 51 out of 51 out of 5
Not Happy At All
My pressure washer is on its 3rd pump. Two pumps replaced prior were factory set and direct bolt-on with no issue. This one was not factory set and will now require me to buy additional tools to adjust this pump correctly before I blow my hoses.

No money saved here... and this product is not sold buy this company, it sold buy another. They do not help with warranty issue they refer you to call another company with issues. Never again, I'll pay the extra money and buy from a chain store.
Cons: Difficult To Use, Bad Instructions
Daniel Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
Daniel,
I am sorry you were referred to the wrong company! You should have been directed to CAT Pumps (763-780-5440, www.catpumps.com) since they handle their warranty and their tech support is spot-on.

We are an authorized seller of CAT Pumps, but we don't make them. Everything we sell has a Factory Warranty from the folks that manufacture the product that covers you, our customer.

We also sell a Fully Plumbed 4PPX30GSI that sounds like it would have been what you were expecting.

The adjustable unloader on this pump can be adjusted with a pair of vise-grips or channel-lock pliers; special tools aren't required.
more
Was this review helpful?
01
Jaime V.
Houston, TX
Purchased from Pressure Washers Direct
Purchased 8/12/13
REVIEWED
SEP.
02
2013
2 out of 52 out of 52 out of 52 out of 52 out of 5
Cat Cheaper Version
Does not come with thermal relief valve. You have to adjust the pressure. Not ready to go!
Jaime Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
Jaime,
A bare pump is just that- just the pump.

If you'd like a replacement pump with connectors and tubing, then you may want to look at the Slap Happy Replacement Pumps that come with all the bells and whistles.
more
Was this review helpful?
74
Tommy A.
Hattiesburg, MS
Total Reviews
2 Reviews
Total Helpful Votes
47 Helpful Votes
REVIEWED
MAY.
21
2013
5 out of 55 out of 55 out of 55 out of 55 out of 5
Best Compact Pressure Washer Money Can Buy
I needed a pressure washer and I looked everywhere to find a special one to to fill my needs.

This is the ultimate machine for cleaning decks & concrete. The thing about it, it's quiet and has an adjustable nozzle on the tip of the wand so you don't have to stop it to install a tip every time.

You can choose 800 PSI for light stuff or switch to 25 degree or 45 degree for more pressure; & the Cat pumps are very durable. And, it's pretty good on fuel consumption.
Was this review helpful?
63
Doug
Purchased from Pressure Washers Direct
Purchased 3/15/13
REVIEWED
MAY.
17
2013
5 out of 55 out of 55 out of 55 out of 55 out of 5
Good Pump
Ordered the Cat Pump as a replacement and upgrade to the original pump on a TroyBilt washer. Pump arrived in short order. Then I find I need to order a thermal relief valve from a different vendor. It arrived in short order.

Then I find I need a pressure gauge to calibrate the pressure relief valve from yet another vendor. It sure would have been quicker and easier if everything had been included with the pump, or, at least, available to order with the pump. After all is said and done, the... more
Brian, the Pressure Washer Expert
Product Expert
Doug,
Bare pumps are sold, well- bare; assuming that elements from the old pump will be re-used. The Slap Happy pump kits that we sell include the siphon tube, hose connectors and pressure valve.

You would still need to purchase the pressure gauge separately; but we sell those, too.
more
Was this review helpful?
74
Bruce B.
Newtown, CT
Purchased from Pressure Washers Direct
Purchased 4/2/15
REVIEWED
APR.
24
2015
3 out of 53 out of 53 out of 53 out of 53 out of 5
Cat Pump Replacement
Removed old Cat. pump 3PPG series, and replaced it with a new 4PPG series, 2800 to 3000 psi.

Now engine is unable to start due to static load from new pump. Now appears the engine needs to be upgraded to a larger horsepower.

The engine is a Model Gx200 Honda, isolated from anything, performs properly and starts immediately. Now we have to go back to the drawing board.
Bruce Recommends This Cat Pumps Product
Was this review helpful?
20
Scott H.
Lake Charles, LA
Purchased from Pressure Washers Direct
Purchased 10/22/14
REVIEWED
DEC.
01
2014
4 out of 54 out of 54 out of 54 out of 54 out of 5
Cat Triplex Pump, 4ppx30gsi
I ordered this pump because my old original pump did not build pressure any more and after some research the new pump purchase was about as cost effective as rebuilding the pump with out taking the time to rebuild it. The only problem I had with installing the new pump was that the adaptor plate did not have threads cut into the holes. I had to tap threads myself into this plate which was really no problem.

Works great, and a lot cheaper than buying a whole new unit.
Pros: Easy To Use, Price, I'd Buy It Again
Cons: Incomplete Machining On Adaptor Plate
Scott Recommends This Cat Pumps Product
Was this review helpful?
53
David L.
Brush Prairie, WA
Purchased from Pressure Washers Direct
Purchased 3/2/15
REVIEWED
APR.
14
2015
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Purchase
After conversing with Mike, I placed my order to purchase this Cat Pump. My order received with in 2 days with applicable directions. I am very impressed with the customer services and response time.

Without any doubt, I will purchase additional parts from your company. Thanks again for making my purchase an excellent experience.
David Recommends This Cat Pumps Product
David's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Very easy purchase from start to finish."
 more
Was this review helpful?
10
Blake R.
West Monroe, LA
Purchased from Pressure Washers Direct
Purchased 2/2/15
Total Reviews
2 Reviews
REVIEWED
FEB.
23
2015
1 out of 51 out of 51 out of 51 out of 51 out of 5
Cat Pump
I bought a hot water pressure washer with a CAT pump on it about 6 months ago, and my pump already went out. This is the third one I have bought and haven't had good luck with any of them. I would not recommend this pump for anyone.
Blake Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
Blake,
I apologize for the issues you are having. However, seals may have been damaged due to the engine running while not dispensing water. I would recommend reaching out to the folks at Pressure Pro for warranty evaluation.

They can be reached at (772) 461-4486. They can evaluate the pump and let you know why it failed. We have very few issues with CAT, and they are one of the best pumps in the industry.
more
Was this review helpful?
32
Free Freight
  • Ships via FedEx Ground
We currently CANNOT ship this product to Alaska, Hawaii or any destination outside of the United States
 


28%
Buy This

Compare
Learn More About 6039

$7.99 



 


20%
Buy This

Compare
Learn More About MH5038QC

$99.00
 $72.00



 


15%
Buy This

Compare
Learn More About SIMPLEKIT

$60.99 



 


13%
Buy This

Compare
Learn More About 6107

$16.99 



 


7%
Buy This

Compare
Learn More About KIRK01

$24.99 



 


7%
Buy This

Compare
Learn More About 6190

$9.99 



 


6%
Buy This

Compare
Learn More About ACI005

$25.99 



 



Compare
Learn More About 6033

$13.99 



 



Compare
Learn More About 6100

$119.00 



 
 
Sign Up
Receive Weekly How-To Tips & Specials