The pump would have an inlet port of 3/8" FNPT and a discharge port of 3/8" MNPT for the fittings.
Free Gift Card Details
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 10/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
CAT Pressure Washer Pump Assembly, 3600 PSI, 3.0 GPM, Direct Drive, Gas, Model# 4SPX32G1I

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
Shipping:
Free shipping (lower 48 states) - Available nowStore Pickup:
Not available - online only
- Pre-plumbed and pre-tested
- Easy Start for easier recoil starting
- 3/8in. M-QC output connection Thermal relief valve offers protection
- Adjustable pressure to suit multiple applications
- Fixed chemical injection
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Pressure washer pump assembly
Downloads
Features + Benefits
- Pre-plumbed and pre-tested
- Easy Start for easier recoil starting
- 3/8in. M-QC output connection Thermal relief valve offers protection
- Adjustable pressure to suit multiple applications
- Fixed chemical injection
- Forged brass manifold and ceramic plungers for durability
- Fits 5in. engine bolt circle
Key Specs
| Attribute | Specification |
|---|---|
item# | A157124 |
Brand | CAT Pumps |
Manufacturer's Warranty | 12 months parts/12months labor |
Ship Weight | 20.0 LB |
Max. PSI | 3,600 |
| Attribute | Specification |
|---|---|
GPM | 3.0 |
Product Type | Pump |
Shaft Diameter | 1 in |
Fuel Type | Natural Gas |
Product Weight | 20 lb |
Reviews
Questions & Answers
Questions
-
· 2 months ago
What is the thread type for the chemical injector ? Mine has broken and I am trying to directly install a barb. Thank you!
1 answer-
ProductExpert6· 2 months ago
Helpful?
-
-
· 7 months ago
What is the part called that your pressure washer hose connects to then it connects to the pump
1 answer-
ProductExpert6· 7 months ago
It would be the pumps outlet fitting.
Helpful?
-
-
· 10 months ago
Is this the replacement for Model #3SPX30G1I?
1 answer-
ProductExpert11· 10 months ago
The model 4SPX32G1I will be the replacement for the model number 3SPX30G1I.
Helpful?
-
-
· 3 years ago
can i use electric and how many hp is needed
1 answer-
ProductExpert6· 3 years ago
This pressure washer pump can only be used with a gas engine. It would require a minimum of a 9 HP engine.
Helpful?
-
-
· 3 years ago
Does this come with the flange to mount to a gas engine?
1 answer-
ProductExpert6· 3 years ago
The pressure washer pump would have a flange to mount to a gas engine.
Helpful?
-
-
· 6 years ago
How much hp does it take to run
1 answer-
ProductExpert38· 6 years ago
This pressure washer pump will require an engine with at least 8 to 9 HP.
Helpful?
-
Accessories We Recommend
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.
Warranty
Manufacturer's Warranty
12 months parts/12months labor
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
Compare with Most Popular in Pressure Washer Pumps + Pump Oil
See All Pressure Washer Pumps + Pump Oil
See All CAT Pumps Pressure Washer Pumps + Pump Oil
Currently Viewing This Product
Item # A157124
$529.99Shipping:
Free shipping (lower 48 states) - Available nowStore Pickup:
Not available - online only
Item # 115180
$9.99Shipping:
Not availableIn Store Only:
Sold only in stores - 11 in stock at Fredericksburg VA
- $999.99
Shipping:
Factory shippedStore Pickup:
Not available - online only
- $274.99
Shipping:
Factory shippedStore Pickup:
Not available - online only
Specifications
3,600
-
3,500
2,000
3.0
-
5.6
2.7
Pump
Antifreeze
Pump
Pump
1 in
-
1 in
0.75 in
Natural Gas
-
-
-
20 lb
0.4000 lb
-
-
-
4 oz
-
-
-
0.4 ft
-
-
-
No
Yes
Yes
-
2.0 x 3.0 x 5.5 in
-
-
-
-
Brass
-
-
-
165 °F
140 °F
-
-
24 mm
-
-
-
1,450 rpm
3,400 rpm
-
-
No
-
-
-
-
4.1 HP
-
-
-
0.75 in
-
-
-
0.38 in
See All Pressure Washer Pumps + Pump Oil
See All CAT Pumps Pressure Washer Pumps + Pump Oil
Recently Viewed Items
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.








