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CAT 4DNX — Review & Specs | Pricepect | Pricepect

Home Pressure Washer PumpsCAT 4DNX

📦

American Pressure Inc.

CAT 4DNX

$429.00

4DNX25GSIBlue

Pressure Washer Pumps

Expert Review Analysis

The CAT 4DNX25GSI is a triplex direct drive plunger pump designed for intermittent-duty pressure washer applications, featuring a brass manifold and solid ceramic plungers for durability. Its ultra-compact hollow-shaft design allows for direct flange mounting to gas engines, making it ideal for portable equipment. The pump includes a fixed chemical injector and an integral regulating unloader for system pressure control.

✓ Best for: Intermittent-duty pressure washing applications. Portable pressure washers powered by gas engines. Applications requiring chemical injection for soap or cleaning solutions. Situations demanding compact, direct-drive pump installation with minimal footprint✗ Not ideal for: Continuous-duty industrial pressure washing operations. Applications requiring liquid temperatures above 140°F (60°C). Users seeking verified consumer reviews or long-term durability testimonials

Pros

✓Triplex plunger design ensures high efficiency and low pulsation for smooth liquid flow
✓Solid ceramic plungers provide a true wear surface that extends seal life significantly

Best Seller Rank History

Now#1,448Best#32Worst#2,204 -1,376

Lower = better sales rank

Rating Trend

Rating4.4/ 5Reviews12+2 reviews -0.40

Specifications

Features

Pump TypeTriplex Plunger

Manifold MaterialBrass

Valve Assembly Material304 Stainless Steel

Plunger MaterialSolid Ceramic

Seal MaterialNBR (Buna-N)

General

BrandAmerican Pressure Inc.

ManufacturerCAT Pumps

Model4DNX25GSI

ColorBlue

Weight10.7 lbs g

Performance

Flow Rate2.5 GPM lpm

Maximum Pressure3000 PSI bar

Maximum RPM3450 RPM rpm

Stroke0.268 inches mm

Bore0.551 inches mm

Ports

Inlet Port Size3/4" GHF

Discharge Port Size3/8" NPTM

Accessory Inlet Port1/4" NPTF

Chemical Injection Hose Barb1/4"

Shaft Diameter3/4" hollow shaft

Power

Drive TypeDirect Drive

Inlet Pressure RangeFlooded to 60 PSI

Crankcase Capacity8.5 oz l

Valve Configuration

Valve Material304 stainless steel

Sealing

Standard Seal MaterialNBR (Buna-N)

Inlet Connection

Inlet Port Type3/4" GHF (Garden Hose Female)

Discharge Connection

Discharge Port Type3/8" NPTM with chemical injector

Chemical Injection

Hose Barb Size1/4"

Dimensions & Weight

Height8.03 inches

Width6.51 Inches

Depth7.73 inches

Weight10.7 Pounds

Research Sources

pressurewashersupplier.com

americanpressureinc.com

allpartsinc.com

kleen-ritecorp.com

hydrocomponents.us

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User Reviews

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4.8

(10 reviews)

✓

Ultra-compact hollow-shaft design enables direct flange mounting to gas engines

✓Stacked stainless steel valve design promotes long-life operation and simplified servicing

✓Integral regulating unloader with built-in bypass protects the pump from overpressure

✓Fixed chemical injector is standard and mounted directly to the unloader valve

✓Brass manifold and 304 stainless steel valve assemblies offer high durability

Cons

✗Designed specifically for intermittent-duty applications rather than continuous heavy use
✗Maximum liquid temperature limit is restricted to 140°F (60°C)
✗Inlet pressure range is limited to flooded conditions up to 60 PSI
✗No expert reviews or professional editor assessments are currently available
✗No user feedback or consumer reports are available to verify real-world durability

Expert Opinion

The search results do not contain expert reviews, professional editor assessments, or detailed technical evaluations from industry publications. The available information is limited to manufacturer specifications and product descriptions from authorized retailers.

What Users Say

The search results provided do not include customer reviews, user testimonials, or recurring complaints from everyday consumers. No feedback data is available regarding real-world performance, durability issues, or user satisfaction.

Common Complaints

No typical complaints are listed as no user feedback data is available.

How It Compares

vs. CAT 4DNX27GSI

Advantages

✓Lower flow rate (2.5 GPM vs 2.7 GPM) may be preferred for specific pressure requirements
✓Slightly shorter stroke (0.268" vs 0.280")

Disadvantages

✗Provides approximately 8% lower flow rate than the 4DNX27GSI
✗Identical maximum pressure and RPM specifications limit performance differentiation

Choose the 4DNX25GSI for slightly lower flow needs, or the 4DNX27GSI for higher flow capacity within the same pressure range.