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Product / / 85.120.016SXB

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

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

Specifications

PSI

2,400

GPM

2.2

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

Max GPM

2.2

Shaft Size

7/8"

Direct Drive

Gas

Weight

7.3 lbs

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PRODUCT

DESCRIPTION

A Reliable Replacement Pump for Gas Pressure Washers

The AR RMW22G24-EZ-SX Pump is a high-performance replacement pump designed for gas-powered pressure washers. Built by Annovi Reverberi (AR), one of the most trusted names in pump technology, this axial cam pump delivers up to 2,400 PSI at 2.2 gallons per minute, making it a powerful and efficient choice for residential and light commercial cleaning equipment. With a 7/8" shaft size and direct-drive design, the RMW22G24 is engineered to pair seamlessly with a variety of gas engines, restoring pressure washer performance quickly and reliably.

Whether you’re repairing a worn-out pump or upgrading for better performance, this pump is packaged boxed and ready for installation, giving you the dependable quality of an AR factory replacement component.

Key Features

  • Pump Manufacturer: Annovi Reverberi (AR)

  • Pump Model: RMW22G24-EZ-SX

  • Pump Style: Axial cam, direct-drive

  • Max PSI: 2,400

  • Max GPM: 2.2

  • Shaft Size: 7/8" (gas engine compatible)

  • Unloader Type: Built-in

  • Plunger (Piston): Tempered steel for durability

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

  • Discharge Size: M22

  • Soap Injector: Fixed chemical injector for detergent use

  • Manifold Type: Lightweight aluminum

  • RPM: 3,400

  • Max Inlet Temp: 43°C / 110°F

  • Thermal Relief Valve: 85.300.022

  • Oil Capacity: 2.2 oz

  • Oil Type: 30W non-detergent pump oil

  • Weight: 7.3 lbs

  • Warranty: 1 Year

Engineered for Dependable Performance

The AR RMW22G24-EZ-SX is built around a direct-drive axial cam design, offering a compact and efficient pumping solution. The 7/8” hollow shaft is compatible with a wide range of small gas engines, making it one of the most common replacement pumps for residential pressure washers. With a max operating pressure of 2,400 PSI and a flow rate of 2.2 GPM, it delivers enough cleaning power to handle driveways, decks, vehicles, outdoor furniture, and more.

The tempered steel plungers increase durability by reducing wear, while the aluminum manifold keeps weight down without sacrificing strength. Together, these materials balance performance and longevity, ensuring the pump can withstand repeated use in tough cleaning conditions.

Easy to Install and Maintain

This pump is designed with user-friendly features to make installation and operation straightforward. The EZ-SX version is manufactured with a side shaft orientation that aligns easily with compatible engines, reducing the effort needed for proper setup.

A built-in unloader regulates system pressure and protects the pump, eliminating the need for external components. The fixed chemical injector allows you to easily apply detergents when cleaning jobs require extra scrubbing power.

Routine maintenance is minimal. The pump uses 2.2 oz of 30W non-detergent oil and includes a thermal relief valve to prevent overheating during extended bypass. These safeguards help extend pump life and ensure reliable operation.

Thermal Protection and Safety

The included thermal relief valve (85.300.022) automatically helps prevent overheating, one of the most common causes of premature pump failure. By purging hot water and allowing cooler water into the pump head, it provides essential protection for long cleaning sessions.

Additionally, the low maximum inlet temperature of 110°F (43°C) ensures that water entering the pump remains at a safe level to prevent damage to seals or pistons. Combined with the built-in unloader and chemical injector, these features make the RMW22G24-EZ-SX both efficient and protected under demanding use.

Common Applications

The AR RMW22G24-EZ-SX is a direct replacement pump for many gas-powered residential pressure washers. Its compact, lightweight design makes it well-suited for consumer-level cleaning tasks, including:

  • Driveways and Sidewalks – Blasting away dirt, algae, and grime.

  • Decks and Patios – Restoring wood, stone, or composite surfaces.

  • Vehicles and Boats – Safe and efficient exterior cleaning.

  • Outdoor Furniture – Keeping patio sets, fences, and garden structures clean.

  • General Household Maintenance – A versatile solution for all-around cleaning.

Product Specifications

  • Model: AR RMW22G24-EZ-SX

  • Max PSI: 2,400

  • Max GPM: 2.2

  • Pump Style: Axial cam, direct drive

  • Shaft Size: 7/8”

  • Unloader Type: Built-in

  • Chemical Injector: Fixed

  • Manifold Material: Aluminum

  • Plunger Material: Tempered steel

  • Inlet Size: 3/4” GHF

  • Discharge Size: M22

  • Oil Capacity: 2.2 oz (30W non-detergent oil)

  • Thermal Relief Valve: 85.300.022

  • RPM: 3,400

  • Max Inlet Temperature: 43°C / 110°F

  • Weight: 7.3 lbs

  • Warranty: 1 Year

Trusted AR Quality

Annovi Reverberi (AR) has been manufacturing pumps for decades, earning global recognition for their high-quality, Italian-engineered designs. The RMW22G24-EZ-SX continues this legacy, providing a cost-effective, reliable replacement option for residential gas pressure washers. Backed by a 1-year warranty, this pump delivers the performance and dependability AR is known for.

When it’s time to replace a worn or damaged pump, the AR RMW22G24-EZ-SX BOXED Pump is the smart choice—engineered for durability, easy installation, and powerful results.

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: