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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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Simpson ALH4440-S 4400PSI Gas Pressure WasherSimpson ALH4440-S 4400PSI Gas Pressure WasherSimpson ALH4440-S 4400PSI Gas Pressure Washer
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Set an alert for the Simpson ALH4440-S - Current lowest price: $1,149.99
Price History
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Price history for the Simpson ALH4440-S
Latest updates:
  • $1,149.99 - November 16, 2023
  • $1,099.99 - November 6, 2023
  • $1,149.99 - September 21, 2023
  • $1,099.99 - September 18, 2023
  • $1,149.99 - August 24, 2023
  • $1,099.99 - August 12, 2023
Data source: lowes.com
Since: August 12, 2023
  • Highest Price: $1,149.99 - August 24, 2023
  • Lowest Price: $1,099.99 - August 12, 2023

Features and Specifications

General
FuelGas-Powered
HandlingHand Truck
WaterCold
PSI4400
GPM4
Cleaning Units17600
Engine420cc CRX 420 OHV 4-stroke
PumpCAT Triplex
SeriesAluminum
Other model numbers61252
Features
FrameAluminum
Soap injectionVia siphon hose
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose50 ft, ⌀3/8
Hose storageHooks
Misc
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
EmissionsCARB, EPA
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

The Simpson ALH4440-S is a heavy duty, commercial pressure washer, that provides its users with an all-around versatile cleaning experience, and enables:

  • spot cleaning of hard, paintless surfaces and reaching far-away areas
  • intense cleaning of hard, unpainted surfaces
  • cleaning of painted and frail surfaces
  • application of detergent and cleaning solutions

The following sections will present you in detail its power characteristics and design, its main features and all the additional features it has to offer.

Power

Its triplex pump, which utilizes a powerful 420cc engine, may deliver a pressure of up to 4400 PSI (almost 73 times more than a standard garden hose) and a flow of up to 4 GPM. These values correspond to a cleaning power of 17600 Cleaning Units.

This gas-powered pressure washer’s CRX 420 engine is started by a traditional pull-start mechanism.

Gasoline is stored in a fuel tank with a maximum capacity of 1.6 gallon.

Design & Handling

With its hand truck design and approximate dimensions of L38 x W23.5 x H29 in, the Simpson ALH4440-S provides great mobility. The aluminum frame grants the device a good durability, as it will not rust. The adds to the ALH4440-S convenience of transport.

The unit's weight of 133 lbs renders its carrying and transportation challenging, as it is far from lightweight. The major reasons for its heavy weight are its 420cc CRX 420 engine, the triplex pump and aluminum frame. However, the unit is manipulated smoothly thanks to its two 13" pneumatic wheels, which play a key role in its maneuverability.

Main Features

The Simpson ALH4440-S's package includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, with a more detailed description below.

  • Soap injection: Detergent is fed in through a siphon hose, since the device lacks a soap tank. The detergent is automatically added to the water when a soap nozzle is connected.
  • Pressure hose: The included 50 ft ⌀3/8" high-pressure hose can be neatly stored on the unit when idle thanks to a set of convenient hooks.
  • Spray gun and wand: Both the classic ergonomic spray gun and its wand may be conveniently stored in a side hook.
  • Nozzles: The 5 included nozzles, and the respective surfaces they’re appropriate for, are listed in the table below.


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 ALH4440-S

Some of the included accessories

  • Onboard storage: The Simpson ALH4440-S's handy storage area lets you store nozzles and accessories, and thus, you’ll be always prepared and have everything necessary for the job at hand.
  • 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: Included with the Simpson ALH4440-S are also the owner's manual and some basic documentation to get you promptly started, along with several accessories, such as oil, pressure hose, wand, spray gun and soap hose.
  • Emissions: The Simpson ALH4440-S is EPA-approved and CARB-compliant. This means that this pressure washer can be bought and sold in each of the 50 states, including California.

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, reaching a PSI of up to 4400, is one of the most powerful gas-powered units in $1000-1300 price range.
  • The water flow of this washer, which reaches up to 4 GPM (gallons per minute) is one of the higher values found in the above-mentioned price range. If maximum rinsing efficiency is your top priority, one of the devices with the highest water flow in the same price range is the Predator 4400, with a GPM of 4.2.
  • With a rather impressive value of 17600 Cleaning Units (PSI X GPM), the ALH4440-S has a higher cleaning efficiency compared to similarly priced devices. If you consider the highest overall cleaning power as a really important factor, the Predator 4400 and its 18480 Cleaning Units has one of the highest cleaning efficiency of all the similarly priced units.

Price comparison

As you can see from this interactive chart, 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
  • Triplex pump
  • Aluminum frame
  • Good range of nozzles included
  • Onboard storage
  • Several security features
  • CARB-compliant
  • 10 year (limited) warranty
  • 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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