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Product / / 85.129.016B

AR RMW22G24-EZ Pump Assembly – 2.2 GPM, 2,400 PSI, 7/8" Shaft

AR RMW22G24-EZ Pump Assembly – 2.2 GPM, 2,400 PSI, 7/8" Shaft

Specifications

UNLOADER

Built-In

WARRANTY

1 Year

RPM

3,400

PUMP MODEL

AR RMW22G24

PUMP TYPE

Axial

Oil Type

30W Non Detergent

Oil Capacity

2.2 oz

Thermal Relief Value

85.300.022

Max Inlet Temperature

43°C / 110°F

Manifold Type

Aluminum

Soap Injector

Fixed

Discharge Size

M22

Inlet Size

3/4" GHF

Plunger Piston

Tempered Steel

Unloader Type

Built-In

Max GPM

2.2

Shaft Size

7/8"

Direct Drive

Gas

Weight

7.3 lbs

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PRODUCT

DESCRIPTION

Factory-Quality Replacement Pump for Gas Pressure Washers

The AR RMW22G24-EZ Pump Assembly is a genuine replacement part designed to restore the performance of your gas-powered pressure washer. Manufactured by Annovi Reverberi (AR), one of the world’s leading pump producers, this axial cam, direct-drive pump delivers up to 2,400 PSI at 2.2 GPM, providing the power needed for residential and light-duty commercial cleaning.

Packaged boxed and ready for installation, this assembly includes everything you need to get back up and running quickly. Whether your existing pump is worn out or underperforming, the RMW22G24-EZ is the trusted, factory-approved solution to keep your pressure washer working like new.

Key Features

  • Pump Manufacturer: Annovi Reverberi (AR)

  • Pump Model: RMW22G24-EZ

  • Pump Style: Axial cam, direct-drive gas

  • Max PSI: 2,400

  • Max GPM: 2.2

  • Shaft Size: 7/8"

  • Unloader Type: Built-in

  • Plunger (Piston): Tempered steel for strength and durability

  • Inlet Size: 3/4" GHF (garden hose fitting)

  • Discharge Size: M22 threaded connection

  • Soap Injector: Fixed, integrated for easy detergent application

  • Manifold Type: Aluminum for lightweight strength

  • RPM: 3,400

  • Max Inlet Temp: 43°C / 110°F

  • Thermal Relief Valve: 85.300.022 included

  • Oil Capacity: 2.2 oz

  • Oil Type: 30W non-detergent pump oil

  • Weight: 7.3 lbs

  • Warranty: 1 Year

Engineered for Reliable Performance

The AR RMW22G24-EZ is one of the most common factory-installed pumps on residential gas-powered pressure washers. Built with an axial cam direct-drive design, it provides efficient power transfer from engine to pump while maintaining a compact footprint. Its 7/8” hollow shaft ensures wide compatibility with small engines used on popular homeowner units.

Delivering up to 2,400 PSI of cleaning power and a flow rate of 2.2 GPM, this pump provides strong, consistent water pressure for a variety of cleaning jobs. From washing cars and boats to blasting dirt from driveways and siding, the RMW22G24-EZ supplies the performance needed for everyday use.

The tempered steel plungers improve wear resistance and longevity, while the lightweight aluminum manifold keeps the pump durable without unnecessary weight. Together, these materials deliver the balance of strength and efficiency that AR pumps are known for.

Simplified Operation with Built-In Features

To reduce installation time and complexity, this pump comes equipped with a built-in unloader valve. This integrated feature regulates pressure automatically, protecting the pump and ensuring consistent output without requiring additional external components.

A fixed chemical injector is also included, allowing users to easily apply soap or detergents directly through the pump system. With this function, tough cleaning jobs like removing mildew, oil stains, or heavy grime become easier and more effective.

The EZ designation identifies the pump’s shaft alignment, making it easier to match with compatible engines during installation.

Thermal Protection and Maintenance

The AR RMW22G24-EZ includes a thermal relief valve (85.300.022), which helps prevent damage during extended bypass operation. This feature automatically releases overheated water, replacing it with cooler water to protect the pump head and seals.

Routine maintenance is simple. The pump requires only 2.2 oz of 30W non-detergent oil, making oil checks and changes quick and inexpensive. With a maximum inlet water temperature of 110°F (43°C), the pump is protected against premature wear from heat, further extending its lifespan.

Common Applications

The AR RMW22G24-EZ Pump Assembly is a direct replacement pump for many residential gas pressure washers. Lightweight and durable, it is designed for homeowners who need reliable cleaning performance across a wide range of tasks:

  • Driveways and Sidewalks – Remove dirt, oil, and weather buildup.

  • Decks, Patios, and Fences – Clean wood, stone, and composite surfaces.

  • Vehicles and Boats – Safe, effective cleaning for cars, trucks, and marine equipment.

  • Outdoor Furniture and Grills – Keep backyard equipment looking new.

  • Home Exteriors – Wash siding, brick, and windows with ease.

Product Specifications

  • Manufacturer: Annovi Reverberi (AR)

  • Model: RMW22G24-EZ Pump Assembly

  • Style: Axial cam, direct-drive

  • Max Pressure: 2,400 PSI

  • Max Flow Rate: 2.2 GPM

  • Shaft Size: 7/8”

  • RPM: 3,400

  • Unloader: Built-in

  • Soap Injector: Fixed

  • Manifold Material: Aluminum

  • Plunger Material: Tempered steel

  • Inlet Connection: 3/4” GHF

  • Discharge Connection: M22

  • Oil Capacity: 2.2 oz

  • Oil Type: 30W non-detergent oil

  • Thermal Relief Valve: 85.300.022

  • Max Inlet Temp: 43°C / 110°F

  • Weight: 7.3 lbs

  • Warranty: 1 Year

Backed by AR Quality

Annovi Reverberi has decades of experience manufacturing pumps used worldwide in pressure washing, agriculture, and industrial applications. Known for their Italian engineering and reliable quality, AR pumps set the standard in durability and ease of use.

The RMW22G24-EZ Pump Assembly is a factory-quality replacement designed to restore lost performance, extend the life of your pressure washer, and deliver powerful cleaning results backed by a 1-year warranty.

When your pump needs replacing, trust the AR RMW22G24-EZ Pump Assembly BOXED—engineered for durability, convenience, and the performance you expect from a name like AR.

Frequently Asked Questions about Pressure Washers

How to store a pressure washer?

To ensure the durability of your heavy duty pressure washer:

  • Empty the gas tank to prevent fuel from degrading or clogging the engine.
  • Empty the pump and hoses of any remaining water.
  • Perform necessary maintenance before storage.
  • Store in a dry area.
  • Cover.

What is a pressure washer?

A power washer is a cleaning machine that uses a gasoline engine to power a high pressure water pump and nozzle. It’s used to clean driveways, decks, vehicles, outdoor furniture and more by spraying water at high PSI to remove dirt, grime, mold and other debris.Many models also come with a detergent tank for added cleaning power.

How does a power washer work?

A power washer works by drawing water from a connected hose and pumping it through a high pressure nozzle. The gas engine powers the pump which pressurizes the water and then expels it through the nozzle at high speed to clean the surface. The water pressure is measured in PSI (pounds per square inch) and the flow rate is measured in GPM (gallons per minute).Many models also feature adjustable water pressure settings to cater to different cleaning needs. BE makes pressure washing easy with models available for light jobs and heavy duty commercial cleaning projects.

Gas vs Electric power washers?

The main difference is that a gas pressure washer, known for its cleaning power, is powered by a gasoline engine, making it more powerful and portable, while an electric pressure washer is powered by electricity and is generally quieter and lighter.

Gas pressure washers are for heavy duty and large areas due to their durability, whereas electric pressure washers are for smaller jobs.

Your BE electric pressure washer is perfect for smaller jobs and built for portability, and we offer a wide range of electric models. Included with our electric models is a long extension cord for use anywhere around your house.

What to consider?

When choosing a gas pressure washer consider:

  • Pressure (PSI): More PSI means more cleaning power but also more potential for damaging delicate surfaces.
  • Flow Rate (GPM): More GPM means faster cleaning as more water is dispensed.
  • Engine Power: Bigger engines mean more durability and power.
  • Portability: Weight, handle design and wheel size for easier to move.
  • Nozzles: Multiple spray nozzles to adjust the spray pattern for different tasks.
  • Adjustable Nozzle: Allows for fine-tuning the spray intensity and pattern for various cleaning needs.

How much pressure do I need for?

The required pressure (PSI) and cleaning power depend on the surface you’re cleaning:

  • Light duty (car washing, outdoor furniture): 1,300-1,800 PSI.
  • Medium duty (patios, fences, decks): 2,000-3,000 PSI.
  • Heavy duty (driveways, brick walls, large equipment): 3,000+ PSI.

Many pressure washers come with adjustable pressure settings to handle different cleaning tasks effectively.

Can a pressure washing damage surfaces?

Yes, a power washer can damage surfaces if used incorrectly. High pressure water can strip paint, dent soft surfaces or even cause structural damage if the pressure is too high or the nozzle is held too close to the surface. Always use the right PSI for the material you’re cleaning and keep a safe distance from delicate surfaces.

To prevent damage, consider using a model with adjustable pressure settings.

How to maintain your pressure washer?

To ensure the durability and smooth operation of a pressure washer:

  • Change the oil as per manufacturer’s instructions.
  • Clean or replace the air filter to ensure good airflow.
  • Inspect and clean the nozzle regularly to prevent clogs.
  • Drain the gas tank if you’re storing the washer for a long time.
  • Check the hoses for leaks or damage and replace them if needed.
  • Follow regular maintenance requirements to keep the washer in optimal condition.

Can I use a pressure washer in cold weather and low water temperature?

You can use a pressure washer in cold weather but it’s more difficult. The water flow rate in the hoses and pump can freeze and damage the equipment. If you plan to use your pressure washer in cold temperatures make sure to winterize it and store it in a warm area when not in use. You can also use anti-freeze solutions for pressure washers.

Some models are designed to use hot water, which can be particularly effective for cleaning in cold weather.

Do I need any accessories?

Common accessories for power washers: