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Product / / 85.149.004B

Comet LWD3025G Pump Assembly – 3.1 GPM, 3,100 PSI, 3/4" Shaft

Comet LWD3025G Pump Assembly – 3.1 GPM, 3,100 PSI, 3/4" Shaft

Specifications

UNLOADER

External 85.300.003

WARRANTY

5 Years

RPM

3,450

PUMP MODEL

Comet LWD3025G

PUMP TYPE

Triplex

Oil Type

30W Non Detergent

Oil Capacity

11 oz

Thermal Relief Value

85.300.024

Max Inlet Temperature

60°C / 140°F

Manifold Type

Brass

Soap Injector

Adjustable 85.400.000

Discharge Size

3/8" Brass QC 85.300.103

Inlet Size

3/4" GHF

Plunger Piston

Ceramic

Unloader Type

External 85.300.003

Max GPM

3.1

Shaft Size

3/4"

Direct Drive

Gas

Weight

13 lbs

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PRODUCT

DESCRIPTION

Professional Triplex Pump for Heavy Duty Gas Pressure Washers

The Comet LWD3025G Pump Assembly (Bare Pump Part #85.140.004) is a professional triplex direct-drive gas pump built for performance and longevity. Up to 3,100 PSI at 3.1 GPM this pump is designed for gas powered pressure washers used in residential, commercial and light industrial applications.

Backed by Comet’s 5 year warranty the LWD3025G has ceramic plungers, brass manifold and external unloader for maximum durability, serviceability and reliability. Whether replacing a worn out pump or upgrading your system this pump has the strength and efficiency you need to get the job done.

Features

  • Bare Pump Part #: 85.140.004

  • Pump Manufacturer: Comet

  • Pump Model: LWD3025G

  • Pump Style: Triplex, direct-drive gas

  • Max PSI: 3,100

  • Max GPM: 3.1

  • Shaft Size: 3/4"

  • Unloader Type: External (85.300.003)

  • Plunger (Piston): Ceramic for maximum wear resistance

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

  • Discharge Size: 3/8" Brass QC (85.300.103)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Type: Brass for strength and corrosion resistance

  • RPM: 3,450

  • Max Inlet Temp: 60°C / 140°F

  • Thermal Relief Valve: 85.300.024 included

  • Oil Capacity: 11 oz

  • Oil Type: 30W non-detergent oil

  • Weight: 13 lbs

  • Warranty: 5 Years

Built to Last

The Comet LWD3025G has a triplex plunger design, a professional standard that provides smoother performance, less vibration and longer life than axial cam pumps. This design ensures high pressure water is delivered consistently even under heavy use.

With an output of 3,100 PSI at 3.1 GPM this pump has the perfect balance of pressure and flow. The higher flow rate allows for faster coverage on larger surfaces, the higher pressure rating for effective dirt, stain and grime removal.

The ceramic plungers withstand heat and abrasion, the brass manifold strength, corrosion resistance and long term reliability. Together these components are durable in residential, commercial and light industrial environments.

Built In Flexibility and Convenience

The external unloader (85.300.003) provides flexibility and ease of service, pressure regulation outside the pump body. This allows you to adjust system pressure, replace the unloader if needed or fine tune for specific tasks.

The adjustable soap injector (85.400.000) gives the operator precise control over detergent application. By switching to a low pressure nozzle you can draw cleaning chemicals into the water stream and adjust detergent flow as needed for optimal cleaning results.

The brass quick-connect discharge fitting (3/8”) ensures secure and reliable hose connections, reduces leaks and minimizes setup time.

Protection and Easy Maintenance

To protect against overheating during extended bypass operation the LWD3025G comes with a thermal relief valve (85.300.024). This valve automatically purges overheated water and replaces it with cooler water to safeguard seals and internal components.

The pump requires 11 oz of 30W non-detergent oil, which lubricates moving parts and reduces wear. Routine checks and oil changes are easy to do and essential for maximum life.

With a maximum inlet temperature of 140°F (60°C) this pump can handle warmer water supplies than many consumer grade pumps, added flexibility in different operating environments.

At 13 lbs the LWD3025G is rugged yet manageable for installation, built with professional grade weight and materials.

Applications

The Comet LWD3025G is versatile enough to support a wide range of cleaning applications for homeowners, contractors and facility managers. Its high PSI and flow makes it suitable for:* Driveways, Patios and Sidewalks – Oil stains, dirt and mildew.

  • Decks, Fences and Siding – Wood, vinyl and composite surfaces.

  • Fleet and Vehicle Washing – Cars, trucks, trailers and boats.

  • Construction Equipment – Caked on mud, dust and grease.

  • Agricultural Tools and Machinery – Tractors, implements and farm equipment.

  • Large Property Maintenance – Big areas fast.

Its 3/4” shaft size makes it compatible with many gas powered engines, a replacement pump for high performance pressure washers.

Product Details

  • Manufacturer: Comet

  • Model: LWD3025G

  • Style: Triplex, direct-drive gas

  • Max Pressure: 3,100 PSI

  • Max Flow Rate: 3.1 GPM

  • Shaft Size: 3/4”

  • RPM: 3,450

  • Unloader: External (85.300.003)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Material: Brass

  • Plunger Material: Ceramic

  • Inlet Connection: 3/4” GHF

  • Discharge Connection: Brass QC 3/8" (85.300.103)

  • Oil Capacity: 11 oz (30W non-detergent oil)

  • Thermal Relief Valve: 85.300.024

  • Max Inlet Temp: 60°C / 140°F

  • Weight: 13 lbs

  • Warranty: 5 Years

Comet Quality

With decades of engineering experience Comet Pumps are trusted worldwide for durability, innovation and reliability. The LWD3025G Pump Assembly continues this tradition with triplex plunger design, brass manifold, ceramic plungers and external unloader in a package that can handle tough jobs.

Backed by a 5 year warranty the LWD3025G is a great long term value and peace of mind. Whether you’re a homeowner upgrading your machine or a professional looking for reliable performance this pump delivers.

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: