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Product / / 85.149.095B

Comet ZWD5030G Triplex Pump – 5.1 GPM, 3,000 PSI, 1" Shaft

Comet ZWD5030G Triplex Pump – 5.1 GPM, 3,000 PSI, 1" Shaft

Specifications

UNLOADER

External 85.300.037

WARRANTY

5 Years

RPM

3,450

PUMP MODEL

Comet ZWD5030G

PUMP TYPE

Triplex

Oil Type

30W Non Detergent

Oil Capacity

14 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 85.300.108

Inlet Size

3/4" GHF

Plunger Piston

Ceramic

Unloader Type

External 85.300.037

Max GPM

5.1

Shaft Size

1"

Direct Drive

Gas

Weight

25 lbs

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PRODUCT

DESCRIPTION

Professional Triplex Pump

The Comet ZWD5030G Pump Assembly (Bare Pump Part #85.140.095) is a professional triplex direct-drive gas pump that packs power, efficiency and durability for demanding applications. Up to 3,000 PSI at 5.1 GPM this pump is for operators who need high flow rates and performance for bigger cleaning jobs, fleet washing, agricultural use and commercial applications.

Built by Comet, a world renowned pump manufacturer, the ZWD5030G has a brass manifold, ceramic plungers and external unloader for long life and operator convenience. Backed by a 5 year warranty it’s a heavy duty solution for cleaning operations.

Features

  • Bare Pump Part #: 85.140.095

  • Pump Manufacturer: Comet

  • Pump Model: ZWD5030G

  • Pump Style: Triplex, direct-drive gas

  • Max PSI: 3,000

  • Max GPM: 5.1

  • Shaft Size: 1" horizontal shaft

  • Unloader Type: External (85.300.037)

  • Plunger (Piston): Ceramic for long life

  • 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 for strength and corrosion resistance

  • RPM: 3,450

  • Max Inlet Temp: 60°C / 140°F

  • Thermal Relief Valve: 85.300.024 included

  • Oil Capacity: 14 oz

  • Oil Type: 30W non-detergent oil

  • Weight: 25 lbs

  • Warranty: 5 Years

High Flow and Efficiency

The Comet ZWD5030G has 5.1 GPM at 3,000 PSI, more flow than standard replacement pumps. This combination of flow and pressure gives great coverage for washing large surfaces fast, rinsing debris efficiently and powering through heavy duty cleaning jobs.

The triplex plunger design gives smooth operation, reduced vibration and longer life than axial pumps. With three precision ceramic plungers the pump maintains consistent pressure and superior heat resistance even under extended use.

Built Tough

Designed for professional use the ZWD5030G uses high quality materials throughout:

  • Ceramic plungers resist wear, heat and abrasion for long life.

  • Brass manifold adds strength and corrosion resistance and helps dissipate heat.

  • 1” horizontal shaft fits most commercial grade gas engines.

At 25 lbs this pump has the heavy duty build you expect from a professional pump but is still easy to install and maintain.

Operator Friendly

This pump has features that make it more controllable, user friendly and flexible:

  • External unloader (85.300.037) gives more flexibility for pressure regulation and easier service than built-in unloaders.

  • Adjustable soap injector (85.400.000) allows precise control of detergent application when used with low pressure nozzles for better cleaning.

  • Brass quick-connect discharge (3/8” – 85.300.108) ensures leak free connections to hoses and accessories.

  • Thermal relief valve (85.300.024) protects the pump from heat damage during extended bypass by purging overheated water.

Serviceable

The Comet ZWD5030G is easy to service and maintain.

  • 14 oz of 30W non-detergent oil is required for proper lubrication.

  • Oil checks and changes are quick and low cost and extend pump life.

  • Can handle inlet water temperatures up to 140°F (60°C) for versatility in any cleaning condition.

With proper care this pump will give you years of trouble free use even in the toughest environments.

Applications

The ZWD5030G Pump Assembly is for tasks where flow is as important as pressure. 5.1 GPM is great for rinsing and covering large surface areas. Common applications include:

  • Fleet and Vehicle Washing – Wash trucks, buses, trailers, RVs and other large vehicles.

  • Agricultural Equipment – Keep tractors, harvesters and implements free from mud and debris.

  • Construction Sites – Tackle the toughest cleaning jobs on machinery, tools and job sites.

  • Commercial Property Maintenance – Clean sidewalks, siding, decks and patios at scale.

  • Surface Preparation – Strip away coatings, dirt and grime before refinishing or repainting.

This pump is a heavy duty gas powered pressure washer replacement.

Product Details

  • Part#: 85.140.095

  • Manufacturer: Comet

  • Model: ZWD5030G

  • Style: Triplex, direct-drive gas

  • Max Pressure: 3,000 PSI

  • Max Flow Rate: 5.1 GPM

  • Shaft Size: 1” horizontal shaft

  • RPM: 3,450

  • 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: 14 oz (30W non-detergent oil)

  • Thermal Relief Valve: 85.300.024

  • Max Inlet Temp: 60°C / 140°F

  • Weight: 25 lbs

  • Warranty: 5 Years

Built by Comet

For decades Comet has been a name you can trust in pressure washer pumps, engineering reliable high performance solutions for professionals worldwide. The ZWD5030G Pump Assembly continues this tradition, triplex durability, high flow and rugged construction for the professional who demands 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: