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Product / / 85.149.090B

Comet FW25030S Pump Assembly – 5.0 GPM, 3,000 PSI, 24 mm Shaft

Comet FW25030S Pump Assembly – 5.0 GPM, 3,000 PSI, 24 mm Shaft

Specifications

UNLOADER

External 85.300.037

WARRANTY

5 Years

RPM

1,450

PUMP MODEL

Comet FW25030S

PUMP TYPE

Triplex

Oil Type

30W Non Detergent

Oil Capacity

13.5 oz

Thermal Relief Value

85.300.022

Max Inlet Temperature

60°C / 140°F

Manifold Type

Brass

Soap Injector

Adjustable 85.400.000

Discharge Size

3/8" Brass QC 85.300.108

Inlet Size

3/4" GHF

Plunger Piston

Ceramic

Unloader Type

External 85.300.037

Max GPM

5.0

Shaft Size

24 mm

Weight

18 lbs

Belt Drive

Gas / Electric

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PRODUCT

DESCRIPTION

Heavy-Duty Belt Drive Triplex Pump

The Comet FW25030S Pump Assembly (Bare Pump Part #85.140.090) is a triplex belt-drive pump designed for high-performance cleaning in professional and industrial applications. Delivering up to 3,000 PSI at 5.0 GPM, this pump offers the perfect combination of power and flow, making it an excellent choice for applications that demand strong cleaning force with wide coverage.

Manufactured by Comet, a leader in pressure washer pump technology, the FW25030S features a brass manifold, ceramic plungers, and an external unloader for durability, precision, and easy maintenance. With its belt-drive design, this pump runs at a lower RPM for smoother operation, less wear, and longer service life. Backed by a 5-year warranty, it provides the reliability and performance that professionals depend on.

Key Features

  • Bare Pump Part #: 85.140.090

  • Pump Manufacturer: Comet

  • Pump Model: FW25030S

  • Pump Style: Triplex, belt drive

  • Drive Type: Gas/Electric compatible

  • Max PSI: 3,000

  • Max GPM: 5.0

  • Shaft Size: 24 mm

  • Unloader Type: External (85.300.037)

  • Plunger (Piston): Ceramic for durability

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

  • Discharge Size: 3/8" Brass QC (85.300.108)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Type: Brass

  • RPM: 1,450 (low-speed operation)

  • Max Inlet Temp: 60°C / 140°F

  • Thermal Relief Valve: 85.300.022

  • Oil Capacity: 13.5 oz

  • Oil Type: 30W non-detergent

  • Weight: 18 lbs

  • Warranty: 5 Years

Professional Power and Efficiency

The triplex plunger design provides smoother operation, greater efficiency, and a longer life span compared to axial pumps. The three ceramic plungers resist wear, heat, and abrasion, ensuring durability under heavy-duty use.

With 3,000 PSI of pressure and 5.0 GPM of water flow, this pump is capable of blasting away stubborn grime while covering large surfaces quickly. Its 1,450 RPM belt-drive design keeps operating speeds low, reducing stress on the pump and engine, and improving long-term reliability.

Rugged Build for Demanding Work

The FW25030S is engineered to withstand the demands of professional cleaning:

  • Brass manifold provides corrosion resistance and effective heat dissipation.

  • Ceramic plungers offer exceptional durability under continuous use.

  • 24 mm shaft ensures secure integration with gas or electric belt-drive systems.

  • 18 lbs of solid construction balances ruggedness with manageable installation.

Every component of this pump is built to handle demanding conditions in industrial, commercial, and agricultural environments.

Operator-Friendly Features

The FW25030S includes features that make operation smooth, safe, and efficient:

  • External unloader (85.300.037): Provides precise pressure control and easy servicing.

  • Adjustable soap injector (85.400.000): Delivers flexible chemical and detergent application for improved cleaning power.

  • Thermal relief valve (85.300.022): Protects the pump by automatically releasing overheated water during bypass operation.

  • Quick-connect brass discharge (3/8” – 85.300.108): Ensures secure and leak-free hose connections.

These features combine professional performance with everyday ease of use.

Low RPM Advantage

The 1,450 RPM low-speed design of the FW25030S reduces heat, noise, and vibration, extending the pump’s operating life. This slower speed improves durability and makes the pump quieter during operation, a benefit in both commercial and residential settings.

With the ability to handle water inlet temperatures up to 140°F (60°C), this pump is also versatile enough for jobs that require warmer water for effective cleaning.

Simple Maintenance

Maintenance is straightforward, ensuring that the pump remains reliable over time:

  • Requires 13.5 oz of 30W non-detergent oil for proper lubrication.

  • Routine oil changes are simple and cost-effective, helping extend service life.

  • Equipped with a thermal relief valve for automatic protection against overheating.

These features make servicing easy, reducing downtime and ensuring consistent performance.

Common Applications

The Comet FW25030S Pump Assembly is versatile enough to tackle a wide range of cleaning tasks across multiple industries:

  • Fleet Maintenance – Wash buses, trucks, trailers, and heavy-duty vehicles.

  • Industrial Cleaning – Maintain equipment, shop floors, and machinery.

  • Construction Sites – Clean concrete, masonry, and construction equipment.

  • Agriculture – Wash tractors, combines, and farm machinery.

  • Property Maintenance – Restore building exteriors, sidewalks, decks, and patios.

  • Car Wash Systems – Suitable for belt-driven car wash equipment requiring consistent performance.

With its high flow rate and strong pressure, the pump is perfect for cleaning both large surfaces and tough grime.

Product Specifications

  • Part #: 85.140.090

  • Manufacturer: Comet

  • Model: FW25030S

  • Style: Triplex, belt drive

  • Drive Type: Gas/Electric compatible

  • Max Pressure: 3,000 PSI

  • Max Flow Rate: 5.0 GPM

  • Shaft Size: 24 mm

  • RPM: 1,450

  • Unloader: External (85.300.037)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Material: Brass

  • Plunger Material: Ceramic

  • Inlet Connection: 3/4” GHF

  • Discharge Connection: Brass QC 3/8" (85.300.108)

  • Oil Capacity: 13.5 oz (30W non-detergent oil)

  • Thermal Relief Valve: 85.300.022

  • Max Inlet Temp: 60°C / 140°F

  • Weight: 18 lbs

  • Warranty: 5 Years

Comet Quality Backed by Warranty

Comet has built a reputation for precision-engineered pumps that stand up to the toughest demands. The FW25030S Pump Assembly continues this legacy, offering a triplex design, brass manifold, ceramic plungers, and external unloader for dependable, professional-grade cleaning.

With a 5-year warranty, this pump provides peace of mind along with lasting performance.

When you need a pump that combines high pressure, strong water flow, and long-term reliability, the Comet FW25030S is the professional’s choice—built to perform under pressure.

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: