SIMPSON

SIMPSON ALH4240 — 4200 PSI Gas Pressure Washer, Aluminum Frame

Name: SIMPSON ALH4240 — 4200 PSI Gas Pressure Washer, Aluminum Frame
Brand: SIMPSON
SKU: P055

ALH4240

Model ALH4240 · Reference P055

$750.00 USD

SIMPSON ALH4240 — 4200 PSI Gas Pressure Washer, Aluminum Frame — product photograph

Image 1 of 5Photo & model references

SIMPSON ALH4240 combines 4,200 PSI and 4.0 GPM for a cleaning setup you can match to your water supply and surface.

Pressure: 4,200 PSI
Water flow: 4.0 GPM
Power source · Source uses gas; exact fuel not independently verified: Gas engine

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Quantity

Up to 10 per item.

Delivery to

Free standard shipping

6–10 business days, including handling

Delivery details

Free 90-day eligible returns

Unused, unassembled and complete for change-of-mind returns; defective-item remedies remain available.

Returns & conditions

Plan the setup

Compare the cleaning setup before choosing accessories.

SIMPSON ALH4240 combines 4,200 PSI and 4.0 GPM for a cleaning setup you can match to your water supply and surface.

4,200 PSI pressure
Pair pressure with the flow rating to choose a cleaning setup for your surface and nozzle.
4.0 GPM water flow
Use the flow rating to plan the water supply and compare cleaning setups alongside PSI.
Gas-engine power
The engine format uses a fuel supply. The exact fuel type must come from the model’s manual.

Before you choose

Match both the listed PSI and GPM to the water supply and the surface you plan to clean.
Check nozzle, hose and connector compatibility for the exact machine.
List the hoses, nozzles and cleaning accessories your job needs, then compare them with the final seller package.

The model details

Specifications

Source-listed facts come from the supplied listing. Manufacturer facts are checked against the exact model. Missing or disputed values are withheld.

SIMPSON ALH4240 — 4200 PSI Gas Pressure Washer, Aluminum Frame specifications
Specification	Value	Evidence
Brand	SIMPSON	Catalogue
Exact model / series	ALH4240	Catalogue
Product reference	P055	Catalogue
Pressure	4,200 PSI	Source-listed
Water flow	4.0 GPM	Source-listed
Power source · Source uses gas; exact fuel not independently verified	Gas engine	Source-listed

Check the configuration

Included components

For package and accessory questions, contact support before ordering.

Contact support to confirm included components before ordering when the package details are not listed.

Keep the reference handy

Manuals & documents

Check the exact model and documentation with support before ordering if a specification or installation requirement is unclear.

A closer look

Product questions

Which pressure and flow should I compare?

This configuration specifies 4,200 PSI and 4.0 GPM.

What is included with this seller’s offer?

Check the listed package details before ordering. Contact support if you need confirmation of a specific battery, charger or accessory; pictured accessories alone do not establish included items.