WE ARE PROUD TO BE INDEPENDENT AND IN NO WAY ASSOCIATED WITH MANUFACTURERS. TO STAY UNBIASED, WE DO NOT ACCEPT FREE PRODUCTS. WE EARN FROM ADVERTISING FEES PAID BY RETAILERS ON QUALIFYING PURCHASES.

Simpson ALH3425-S - Spec Breakdown

The Simpson Aluminum ALH3425-S is a gas-powered pressure washer offering a maximum water pressure of 3600 PSI and flow of 2.5 GPM. (Read full specs)

-No User ReviewsWrite a review
CompareShortlistShortlistedRemoved from shortlist 15
Simpson ALH3425-S 3600PSI Gas Pressure WasherSimpson ALH3425-S 3600PSI Gas Pressure WasherSimpson ALH3425-S 3600PSI Gas Pressure WasherSimpson ALH3425-S 3600PSI Gas Pressure Washer
Set Price Alert
×
Notify me when the price drops
Set an alert for the Simpson ALH3425-S - Current lowest price: $599.95
Price History
×
Price history for the Simpson ALH3425-S
Latest updates:
  • $599.95 - February 28, 2022
  • $539.96 - February 22, 2022
Data source: ebay.com
Since: February 22, 2022
  • Highest Price: $599.95 - February 28, 2022
  • Lowest Price: $539.96 - February 22, 2022

Features and Specifications

General
FuelGas-Powered
HandlingWheelbarrow
WaterCold (100°F max.)
PSI3600
GPM2.5
Cleaning Units9000
Engine196 cc 5.5 HP Honda GX200 OHV 4-stroke
PumpAAA Triplex
SeriesAluminum
Other model numbers60689, 60768
Features
FrameAluminum
Soap injectionVia siphon hose
Soap dilution7:1
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose35 ft, ⌀5/16
Hose storageHooks
Misc
Dimensions
(L x W x H)
Approx. 34 x 21 x 24 in
Weight78 lbs
Pressure controlValve
Wheels2 wheels, ⌀10", pneumatic
Included accessoriesOil, steel wand, spray gun, high pressure hose, soap hose, 5 nozzles
SecurityLow oil, trigger lock and thermal relief valve
EmissionsCARB, EPA
Warranty10 years
UPC879399001352

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

×

This form does not send us any personal data (not even your IP address)

Description

Built for professional grade performance, the SIMPSON® Aluminum Series 3600 PSI @ 2.5 GPM pressure washer is built to perform. With a powerful Honda engine, reliable triplex pump and ultra lightweight aircraft grade aluminum frame, this gas pressure washer is great for construction, equipment upkeep, facility & fleet maintenance cleaning. (source: Simpson (opens in a new tab))

Zoom on the Simpson ALH3425-S

The Simpson ALH3425-S, a heavy duty, commercial pressure washer, gives its user an all-around versatile cleaning experience, topped off by the following features:

  • spot cleaning of hard, unpainted surfaces or high reach areas
  • intense cleaning of hard, unpainted surfaces
  • cleaning of painted or delicate surfaces
  • applying detergent and cleaning solutions

Its power characteristics and design, its main features and all its additional features are presented ahead.

Power

The Simpson ALH3425-S in use

The Simpson ALH3425-S

Its triplex pump, which utilizes a 196 cc (5.5 hp) engine, may deliver a pressure of up to 3600 PSI (almost 60 times more than a standard garden hose) and a flow of up to 2.5 GPM. These values correspond to a cleaning power of 9000 Cleaning Units.

This gas-powered pressure washer’s Honda GX200 engine is started by a traditional pull-start mechanism.

The fuel is stored in a steel tank, which can hold up to 0.83 gallon of gasoline.

Design & Handling

The wheelbarrow design of the Simpson ALH3425-S grants mobility and stability to the unit. The aluminum frame allows the device to remain highly durable, as it will not rust. The handle adds to the ALH3425-S convenience of transport.

With a weight of 78 lbs, the unit can be easily maneuvered by most users. Since the 196 cc Honda GX200 engine and triplex pump account for a large part of its weight, Simpson's utilization of an aluminum frame keeps the unit at a reasonable weight. But, as the ALH3425-S does have a set of two 10" pneumatic wheels, it can be easily maneuvered and manipulated.

Main Features

The Simpson ALH3425-S in use

The Simpson ALH3425-S

The Simpson ALH3425-S comes with a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are detailed below.

  • Soap injection: Even though the device doesn't have a soap tank, detergent is supplied by a siphon hose. The automatic soap dilution mechanism of the Simpson ALH3425-S will dilute the detergent with a 7:1 ratio. If a soap nozzle is attached, the device will proceed to add the detergent to the water automatically.
  • Pressure hose: Using a set of convenient hooks, the included 35 ft ⌀5/16" high-pressure hose can be easily stored on the unit when it is not running.
  • Spray gun and wand: The included classic ergonomic spray gun and its steel wand can be easily stored in a side hook.
  • Nozzles: The following table illustrates the 5 included nozzles, along with the surfaces which they are the most suitable for.
 


15°

25°

40°

Soap
Concrete, brick, masonryUse with cautionSuitableSuitableSuitableSuitable
Siding, gutters, houseNot recommendedUse with cautionUse with cautionSuitableSuitable
Fencing, deck, patioNot recommendedUse with cautionUse with cautionSuitableSuitable
Lawn equipment, boat, RVNot recommendedUse with cautionUse with cautionUse with cautionSuitable

Note: The shape of the nozzles above is for illustration purposes only and may differ.
Red cross: Not recommended. Green check: Suitable. Orange check: Use with caution.

Other Features

Some of the accessories of the Simpson ALH3425-S

Some of the included accessories

  • Onboard storage: The Simpson ALH3425-S allows you to be always fully prepared, as it features a handy storage area, where nozzles and accessories can be stored.
  • Safety: Safety of operation is enhanced by a thermal relief valve (which helps to prevent internal pump damage), a trigger lock mechanism (which prevents accidental operation) and a low oil protection.
  • Accessories: Included with the Simpson ALH3425-S are also the owner's manual (opens in a new tab) and some basic documentation to get you promptly started, along with several accessories, such as pressure hose, spray gun, soap hose, oil and wand.
  • Emissions: The Simpson ALH3425-S is EPA-approved and CARB-compliant. Therefore, the sale and purchase of this pressure washer is permitted in all of the 50 states, including California.

Product Video

The Simpson ALH3425-S's performance versus other pressure washers

The following charts are provided to give you an idea of how the key specs of the Simpson ALH3425-S compare to similarly priced pressure washers.

  • Able to deliver a maximum pressure of 3600 PSI, the Simpson ALH3425-S is one of the gas-powered products that can produce the highest water pressure, in the $500 to $600 price range.
  • This washer reaches 2.5 GPM (gallons per minute) and thus, has an average water flow compared to similarly priced devices. In case you are looking for a device which can most efficiently rinse away debris in the current price range, the Briggs & Stratton 20505 has the highest GPM of 2.8.
  • Reaching up to 9000 Cleaning Units (PSI X GPM), the ALH3425-S is one of the more efficient amongst its similarly priced peers. When it comes to the highest overall cleaning power in the current price range, one of the products at the very top currently is the Briggs & Stratton 20505 and its 9520 Cleaning Units.
According to our stats, the following comparison is pretty popular: Simpson ALH3425-S vs Simpson PS3228-S.

Price comparison

As you can see from this interactive chart, when compared to other gas-powered washers between 9000 and 9500 Cleaning Units, the Simpson ALH3425-S is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget pressure washer.

The bottom line

STRENGTHS:
  • Inexpensive
  • Triplex pump
  • Honda engine
  • Designed to be stable
  • Aluminum frame
  • Good range of nozzles included
  • Automatic detergent dilution
  • Onboard storage
  • Several security features
  • CARB-compliant
  • 10 year (limited) warranty
  • High PSI for the price
  • High CU for the price
AVERAGE SPECS:
  • Decent GPM for the price
WEAKNESSES:
  • No soap tank

Do you own the Simpson ALH3425-S and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

About Simpson

Simpson has over 50 years of experience making quality products for the outdoor power equipment industry. Part of the FNA Group based in Pleasant Prairie, Wisconsin since 2006, they are a vertically-integrated company, meaning most of the parts and accessories are manufactured and assembled by them. Their manufacturing facilities are international. With the company motto "Driven by Performance", Simpson continues to offer a great variety of pressure-washing systems for the homeowner or the professional contractor.

Warranty Information

The Simpson ALH3425-S is covered under a warranty for up to 10 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Simpson pressure washers, please contact the Simpson Customer Support: 1-877-362-4271.

We would love to know your opinion

Leave a review

Your total score

Pressure Washer Database
Logo
Compare items
  • Total (0)
Compare

You can compare as many pressure washers as you wish. However, for the best results, we recommend you to compare only 2 products at a time.

0