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Simpson ALH4440-S - 4400 PSI 4 GPM 420cc Gas Pressure Washer

The Simpson ALH4440-S is a gas-powered pressure washer offering a maximum water pressure of 4400 PSI and flow of 4 GPM. (Read full specs)

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Features and Specifications

FuelGas-Powered
HandlingHand Truck
WaterCold
PSI4400
GPM4
Cleaning Units17600
Engine420cc CRX 420 OHV 4-stroke
PumpCAT Triplex
SeriesAluminum
Other model numbers61252
FrameAluminum
Soap injectionVia siphon hose
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose50 ft, ⌀3/8
Hose storageHooks
Dimensions
(L x W x H)
Approx. 38 x 23.5 x 29 in
Weight133 lbs
Wheels2 wheels, ⌀13", pneumatic
Included accessoriesOil, wand, spray gun, high pressure hose, soap hose, 5 nozzles
SecurityLow oil, trigger lock and thermal relief valve
EmissionsEPA
Warranty10 years
UPC879399008535

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.

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Description

Zoom on the Simpson ALH4440-S

In summary, the Simpson ALH4440-S is a heavy duty, commercial pressure washer, that offers an all-around versatile cleaning experience, and also:

  • spot cleaning of hard, unpainted surfaces, reaching high areas, and removing stubborn stains
  • comprehensive cleaning of hard surfaces, vehicle washing, and readying surfaces for painting
  • delicate surface cleaning, andbroad area cleaning with reduced pressure
  • utilizing cleaning solutions, and rinsing surfaces clean

Ahead are presented its power characteristics and design, its main features and any other additional features.

Power

The Simpson ALH4440-S's triplex pump, powered by a powerful 420cc engine, can provide a pressure of up to 4400 PSI (approximately 73 times more than a standard garden hose) and a flow of up to 4 GPM (values as per PWMA testing standards). Thus, the Simpson ALH4440-S achieves a cleaning power of 17600 Cleaning Units.

To start the CRX 420 engine of this gas-powered washer, users employ the familiar pull-start technique.

The pressure washer's tank has a maximum capacity of 1.6 gallon for storing gasoline..

Design & Handling

The Simpson ALH4440-S's mobility is greatly enhanced by its hand truck design. Designed with an aluminum frame, this pressure washer combines lightweight construction with robust durability, offering corrosion resistance/strong> and effortless maneuverability for long-term reliability. The adds to the ALH4440-S convenience of transport.

At 133 lbs, we can't really say that the unit is lightweight, and manually lifting or transporting it could be a significant challenge for users, especially if they need to move it frequently or navigate over uneven terrain. A key role in its final weight is played by its 420cc CRX 420 engine, the triplex pump and aluminum frame. Despite this, the presence of two 13" pneumatic wheels reduces the complexity of moving the ALH4440-S, even on rugged surfaces.

Main Features

Along with the Simpson ALH4440-S itself, the package also includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are discussed in further detail below.

  • Soap injection: Despite the absence of a soap tank, detergent supply is facilitated through the use of a siphon hose. Once a soap nozzle is connected, the pressure washer automatically blends the detergent with the water flow.
  • Pressure hose: The included 50 ft ⌀3/8" high-pressure hose can be neatly stored on the unit when not in use, utilizing a set of convenient hooks for convenient organization.
  • Spray gun and wand: The included classic ergonomic spray gun and its wand can be easily stored in a side hook.
  • Nozzles: The table below shows you the 5 included nozzles and the surfaces they're the most appropriate 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

Important note: The shapes of the depicted nozzles serve for illustration purposes only and may vary. Symbols used include a red cross for 'Not recommended,' a green check for 'Suitable,' and an orange check for 'Use with caution.'

Other Features

Some of the accessories of the Simpson ALH4440-S

Some of the included accessories

  • Onboard storage: Stay prepared for any job with Simpson ALH4440-S's handy storage area, which allows you to neatly store any nozzles and accessories which you may need for the job.
  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation), a thermal relief valve (which helps to prevent internal pump damage) and a low oil protection.
  • Accessories: The Simpson ALH4440-S comes with an owner's manual (opens in a new tab) and some basic documentation to get you quickly started. On top of that, you also get soap hose, spray gun, wand, oil and pressure hose.

The Simpson ALH4440-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 ALH4440-S compare to similarly priced pressure washers.

  • The Simpson ALH4440-S, which can reach up to 4400 PSI, has one of the highest pressure outputs of the gas-powered units that cost between $1000 and $1300.
  • With a maximum GPM of 4 (gallons per minute), this washer belongs to the best in terms of water flow, in its respective price range.
  • With 17600 Cleaning Units (PSI X GPM), the ALH4440-S ranks as among the most efficient devices in its price range.

Price comparison

As you can see from these interactive charts, when compared to other gas-powered washers between 17500 and 18000 Cleaning Units, the Simpson ALH4440-S is on the average side of the price range.

Therefore, this pressure washer nicely fits in the expected budget for this kind of cleaning power.

The bottom line

STRENGTHS:
  • In the expected price range
  • 10 year (limited) warranty
  • Triplex pump
  • Aluminum frame
  • Good range of nozzles included
  • Onboard storage
  • Several security features
  • High PSI for the price
  • High GPM for the price
  • High CU for the price
WEAKNESSES:
  • No soap tank

Do you own the Simpson ALH4440-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, but their gas-powered pressure washers are made in the USA. 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 ALH4440-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.

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