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Product / Pressure Washers / 85.129.105B

Centurion P3+ Direct Drive Triplex 3100PSI 3.1GPM Pressure Washer Pump - 85.129.105B

Centurion P3+ Direct Drive Triplex 3100PSI 3.1GPM Pressure Washer Pump - 85.129.105B

Specifications

PSI

3,100

GPM

3.1

UNLOADER

External

WARRANTY

7 Years

RPM

3,450

PUMP MODEL

Centurion P3 - CTG1S

PUMP TYPE

Triplex

Oil Type

30W Non-Detergent

Oil Capacity

9.75 fl oz

Thermal Relief Value

85.300.024

Max Inlet Temperature

60°C / 140°F

Manifold Type

Brass

Soap Injector

Adjustable

Discharge Size

3/8" Brass QC

Inlet Size

3/4"

Shaft Size

3/4"

Bare Pump Part

85.120.105B

Weight

10 lbs

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PRODUCT

DESCRIPTION

Built to Deliver Pro Performance - A Compact, Durable Powerhouse for Pressure Washers

What Makes It a Top Choice for Pros?

The Centurion P3+ Direct Drive Triplex Pressure Washer Pump (85.129.105B) is all about giving pros the serious cleaning power they need in a compact, long-lasting package. Designed by CP, one of the pump industry's most respected leaders, the P3+ delivers 3,100 PSI and 3.1 GPM - just the right balance of oomph and water flow for taking on tough cleaning tasks.

This pump is a direct drive gas setup, which means it couples directly with smaller-to-mid-sized gas engines, minimizing that annoying vibration and giving you the maximum power transfer. And that's not all - the triplex ceramic plunger design, brass manifold, and external unloader all come together to give you consistent high pressure, smooth performance, and long-lasting reliability - even in the face of continuous use.

Whether you're washing up heavy equipment, cleaning construction sites, or restoring exterior surfaces, the P3+ is built to be the go-to for pros who live and die by their gear.

Technical Overview

  • PMR PART #: 85.129.105B

  • BARE PUMP PART #: 85.120.105B

  • PUMP MANUFACTURER: CP

  • PUMP MODEL: CTG1S

  • Direct Drive: Gas

  • Shaft Size: 3/4"

  • Pump Style: Triplex

  • Max PSI: 3100

  • Max GPM: 3.1

  • Unloader Type: External

  • Plunger (Piston): Ceramic

  • Inlet Size: 3/4" GHF

  • Discharge Size: 3/8" Brass QC

  • Soap Injector: Adjustable

  • Manifold Type: Brass

  • RPM: 3450

  • Max Inlet Temp: 60°C / 140°F

  • Thermal Relief Valve: 85.300.024

  • Oil Capacity: 9.75 fl oz

  • Oil Type: 30W Non-Detergent

  • Weight: 10 lbs

  • Warranty: 7 Years

A Compact Powerhouse with Pro Precision

The Centurion P3+ packs high-impact cleaning power into a lightweight, versatile package. It's designed for use with 3450 RPM gas engines, and the direct drive triplex pump puts out 3,100 PSI and 3.1 GPM - making it perfect for medium to heavy-duty pressure washing.

This balance of power and flow makes it great for:

  • Washing equipment and fleet maintenance

  • Residential and commercial property washing

  • Cleaning concrete and surfaces

  • Construction and industrial applications

  • Washing agricultural and farm equipment

Whether you're running it on a portable pressure washer or integrating it into a fixed system, the P3+ gives pros the efficiency and longevity they demand.

Built to Last with Top-Notch Materials

The Centurion P3+ is all about giving pros the performance and durability they need under tough operating conditions.

Triplex Ceramic Plunger Design

This pump uses a triplex plunger system - three ceramic pistons driven by a precision crankshaft - to deliver smooth, pulsation-free water flow. Ceramic plungers are rock-hard, corrosion-resistant, and super-efficient at dissipating heat - which means they cut down on friction and extend seal life even under continuous operation.

Brass Manifold for Superior Strength

The solid brass manifold gives you top-notch strength, corrosion resistance, and long-term sealing performance. It's a heck of a lot better than cast aluminum alternatives, which can pit and distort under high pressure - leading to leaks and premature failure.

External Unloader for Easy Adjustment

The external unloader valve lets you fine-tune system pressure for different surfaces or cleaning applications. Plus, it gives you easier service access and quick replacement - keeping downtime to a minimum.

Adjustable Soap Injector for Precision

The adjustable chemical injector lets you easily switch between detergent application and rinse modes. It also gives you fine control over chemical draw - so you can deliver the right amount of cleaning agent without waste or inconsistency.

Thermal Relief to Keep Your Pump Safe

To prevent heat buildup and damage, the P3+ includes a thermal relief valve (85.300.024). This feature automatically releases overheated water from the pump head - protecting seals and internal components from heat-related wear.

Reliable and Efficient Direct Drive DesignThe Direct Drive Configuration

The direct drive configuration is a game-changer because it connects the pump directly to the engine's drive shaft. This design dramatically reduces mechanical complexity which in turn ensures efficient power transfer. Not only that, but it also gives you a super compact footprint - perfect for portable gas-powered pressure washer systems.

Benefits of Direct Drive Pumps:

  • Compact - no need to worry about running out of space

  • Fewer moving parts means less maintenance

  • Efficient power transmission is just one of the many benefits

  • Easy installation on gas engines - a big plus

  • Lower initial cost compared to belt-drive systems - a welcome surprise

The Centurion P3+ comes with a 3/4" shaft, which fits most standard small to mid-size gas engines including the likes of Honda GX, Kohler, and the Powerease models. That makes it a breeze to replace or upgrade on many commercial-grade pressure washers.

Designed for Durability

From the materials to the machining, every single detail of the Centurion P3+ is engineered to withstand the test of time - and lots of use.

  • Hardened crankshaft for consistent rotation and a long service life

  • High-quality seals and bearings for maximum wear resistance

  • Corrosion-resistant brass and ceramic components to keep the pump going and going

  • 30W non-detergent oil lubrication reduces friction and heat

  • So straightforward it's low-maintenance with quick access to serviceable parts

And with a weight of just 10 pounds, the P3+ is lightweight yet rugged - a durable pump that can handle tough jobs without adding bulk to your equipment.

Powerful, Steady Performance

The Centurion P3+ keeps going and going - stable pressure and consistent flow even during extended use thanks to its balanced triplex plunger system and external unloader. Whether it's blasting grime off construction equipment or washing down large surfaces, this pump delivers smooth, continuous power.

Performance Highlights:

  • 3,100 PSI cleaning power - deep, efficient washing

  • 3.1 GPM for optimal coverage and balanced flow

  • 3,450 RPM operation for gas-powered pressure washers

  • Low vibration, steady performance even under load

  • Quick smooth transitions between pressure and chemical application

Built for Real World Demands

The P3+ was designed to meet the needs of cleaning professionals in various industries. It’s perfect for commercial and industrial cleaning environments where reliability and uptime matter most.

Common Applications Include:

  • Pressure washer replacement pumps

  • Mobile wash trailers and truck-mounted systems

  • Construction and restoration sites

  • Agricultural equipment maintenance

  • Property and facility cleaning services

  • Car wash and fleet wash stations

  • From concrete driveways to heavy-duty machinery, the P3+ provides the reliable, high-pressure cleaning power you can depend on

Easy Maintenance and Service Access

Pros love how easy the P3+ is to service. Its external unloader, accessible crankcase, and standard fittings make it a breeze to inspect, adjust and replace parts as needed.

Maintenance Tips:

  • Always check the oil level before each use and replace after every 500 operating hours

  • Don't forget to use only 30W non-detergent oil to keep things running smoothly

  • Inspect seals, hoses and fittings regularly for wear or leaks

  • Flush the chemical injector and hoses after each use to prevent buildup

  • Use clean, filtered water to keep internal components from contaminants

Do this and your P3+ will keep on performing at peak levels, reducing downtime and extending its lifespan

Getting Started with Installation and Compatibility

Installing the P3+ is a doddle, which is why its a preferred choice for pro technicians and OEM builders alike.

Installation Steps:

  1. Mount the pump securely to the engine flange.

  2. Align the 3/4" shaft and keyway for proper coupling.

  3. Connect the 3/4" GHF inlet to a filtered water supply.

  4. Attach the 3/8" brass quick-connect discharge to the pressure hose.

  5. Fill the crankcase with 9.75 fl oz of 30W non-detergent oil.

  6. Prime the pump and test system pressure before full operation.

The P3+ is compatible with most horizontal shaft gas engines, making it perfect for upgrading or replacing pumps on commercial pressure washer frames.

Longevity and Peace of Mind Guaranteed

Durability isn't just a goal - it's a guarantee. Every Centurion pump is put through rigorous testing for pressure stability, flow rate consistency and seal integrity before it leaves the factory. The P3+ comes with a 7-year manufacturer’s warranty, which shows just how confident CP is in their engineering and craftsmanship

That extended warranty gives you long-term protection, giving users the confidence that your investment will deliver years of dependable service in demanding environments

Why Choose Centurion?

When professionals choose Centurion pumps, they’re choosing a brand that's synonymous with power, reliability and precision. Every pump in the Centurion lineup is built to meet the high standards of industrial users - combining cutting-edge materials, proven engineering and a commitment to long service life.

The Centurion Advantage:

  • Top-notch performance in a surprisingly compact package

  • Engineered by a team you can trust at CP - they've earned the respect of pressure washer manufacturers worldwide

  • Long-lasting ceramic plungers that won't give up, and a brass manifold for that extra bit of robustness

  • Easy enough to work on, even when you're in a pinch

  • This pump will keep on trucking - even when its being pushed to the limit

  • And because we're confident in its build quality , its backed by a 7 year warranty

The P3+ shows us just what makes the Centurion pumps so beloved by professionals - top performance, extended lifespan and the confidence to take on any job that comes your way.

Key Features

  • Model: CTG1S (Centurion P3+)

  • PMR Part #: 85.129.105B

  • Bare Pump #: 85.120.105B

  • Direct Drive: Gas

  • Style: Triplex

  • Max PSI: 3100

  • Max GPM: 3.1 GPM

  • Manifold: Brass

  • Plungers: Ceramic

  • Unloader: External

  • Soap Injector: Adjustable

  • Thermal Relief Valve: 85.300.024

  • Oil Capacity: 9.75 fl oz of 30W non-detergent

  • Weight: 10 lbs

  • Warranty: 7 years

The Centurion P3+ is a top of the line pump that really does deliver - Its got the triplex ceramic plunger design, a brass manifold and a very useful external unloader. This all adds up to a pump that delivers dependable, long term performance in all sorts of applications.

Its built to work seamlessly with direct drive engines running at a nice and smooth 3,450 RPM and will give you plenty of power and keep on going with out a lot of fuss or maintenance . Whether you're washing down a fleet of trucks , restoring a building , or cleaning up a big mess this pump will keep on trucking .

Backed by a 7 year warranty you can have the confidence that this pump is top quality, will keep performing and will not let you down

Centurion P3+ - precision engineered and built to last , and trusted by the biggest professionals.

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: