Centurion P10 Belt Drive Triplex 4100 PSI 8.5 GPM Pressure Washer Bare Pump – 85.120.171B

Industrial-grade power, precision engineering, and unbeatable reliability — the Centurion P10 is the ultimate pump for high-flow, high-pressure cleaning systems.

Built for Maximum Performance

The Centurion P10 Belt Drive Triplex Pump (85.129.171B) is engineered for professionals who demand extreme power and long-lasting durability. Designed and manufactured by CP, one of the most respected names in high-pressure pump technology, the P10 delivers an incredible 4,100 PSI of pressure at a flow rate of 8.5 GPM, making it one of the most capable and efficient pumps in the Centurion lineup.

This model combines belt drive operation, triplex ceramic plungers, and industrial-grade brass construction to produce smooth, consistent performance under continuous-duty cycles. Whether used with gasoline or electric power, the P10 offers the perfect balance of high flow and controlled pressure for large-scale, heavy-duty cleaning operations.

From fleet washing and factory maintenance to agricultural and marine applications, this pump is built to run cool, clean, and reliably for years — even in the most demanding environments.

Technical Overview

• PMR PART #: 85.129.171B

• BARE PUMP PART #: 85.120.171B

• PUMP MANUFACTURER: CP

• PUMP MODEL: CTB2S

• DRIVE TYPE: Belt Drive (Gas / Electric)

• SHAFT SIZE: 24 mm

• PUMP STYLE: Triplex

• MAX PSI: 4,100

• MAX GPM: 8.5

• UNLOADER TYPE: External

• PLUNGER (PISTON): Ceramic

• INLET SIZE: 3/4" GHF

• DISCHARGE SIZE: 3/8" Brass Quick Connect

• SOAP INJECTOR: Adjustable

• MANIFOLD TYPE: Brass

• RPM: 1,750

• MAX INLET TEMP: 74°C / 165°F

• THERMAL RELIEF VALVE: 85.300.022

• OIL CAPACITY: 37 fl oz

• OIL TYPE: 30W Non-Detergent

• WEIGHT: 40 lbs

• WARRANTY: 7 Years

Designed for Industrial Power

At 4,100 PSI and 8.5 GPM, the Centurion P10 stands in a class of its own. This high-output pump delivers massive cleaning power while maintaining cool, efficient operation thanks to its belt-driven, low-RPM design (1,750 RPM).

This lower operating speed reduces heat, vibration, and wear on seals and bearings — extending service life and minimizing maintenance downtime. The P10 is ideal for continuous-duty use in large commercial and industrial systems, including:

• Heavy equipment wash bays

• Agricultural and food production facilities

• Fleet and truck washing operations

• Industrial plant maintenance

• Surface preparation and restoration

• Marine and shipyard cleaning

Where power, endurance, and performance matter, the Centurion P10 is the professional’s choice.

Key Features

Triplex Ceramic Plunger Design

At the heart of the Centurion P10 lies its precision-engineered triplex plunger system. Three ceramic plungers deliver a perfectly balanced stroke, reducing vibration and maintaining smooth, consistent pressure. Ceramic provides exceptional durability — it’s harder than steel, resists corrosion, and dissipates heat efficiently. The result is quieter operation, reduced friction, and an extended lifespan for seals and valves.

Industrial Brass Manifold

The solid brass manifold is built to withstand high pressure and corrosion. Unlike cast aluminum, brass resists pitting and deformation, ensuring precise sealing and long-term reliability. The heavy-duty design also absorbs vibration and heat more effectively, making it ideal for long work cycles and high temperatures.

External Unloader

The external unloader system gives operators full control over system pressure and bypass flow. It allows quick adjustments for different cleaning applications and makes servicing straightforward. This design improves cooling and prevents damage from over-pressurization, protecting the pump and connected components.

Adjustable Soap Injector

The adjustable chemical injector provides flexibility for detergent applications, letting you control chemical draw and mixture strength directly at the pump. Perfect for switching between deep cleaning and rinsing tasks without interrupting your workflow.

Thermal Relief Valve (85.300.022)

The thermal relief valve automatically releases overheated water from the pump head during bypass mode. This prevents excessive heat buildup when the trigger gun is closed for extended periods, protecting internal seals and pistons from damage.

High Oil Capacity Crankcase

The P10 features a 37 fl oz oil capacity — one of the largest in its class — for superior lubrication and cooling. The oil-bath crankcase reduces friction, minimizes wear, and extends maintenance intervals. With 30W non-detergent oil, it ensures clean, consistent lubrication and protection under high loads.

Built for Belt Drive Power Systems

The Centurion P10 is optimized for belt drive systems, allowing it to be paired seamlessly with both gas engines and electric motors. Belt drive operation isolates the pump from engine vibration and ensures cooler, quieter performance by lowering the pump’s operating speed to 1,750 RPM.

Advantages of Belt Drive Pumps:

• Reduced wear and vibration for longer service life.

• Cooler operation, ideal for extended or continuous-duty cycles.

• Quieter performance, perfect for professional wash bays or indoor setups.

• Flexible power source compatibility (gas or electric).

• Lower maintenance costs compared to direct drive pumps.

The 24 mm solid shaft ensures compatibility with standard pulleys and couplers, making the P10 a flexible choice for OEMs, rebuilds, and custom system integrations.

Precision Engineering You Can Trust

Every component of the P10 has been meticulously designed and tested to deliver high performance under heavy workloads. From its hardened crankshaft to its precision-ground valves, this pump is built to handle extreme pressure without compromising smoothness or stability.

Premium Construction Includes:

• Hardened steel crankshaft and connecting rods.

• Oversized bearings for extended lifespan.

• Viton seals and O-rings for superior chemical and heat resistance.

• High-tolerance machining for smoother flow and reduced pulsation.

• Pressure-tested assembly for guaranteed reliability.

This level of craftsmanship ensures that the P10 maintains steady output even under fluctuating loads — an essential feature for industrial and commercial users.

Performance That Delivers Results

With a flow rate of 8.5 GPM, the P10 covers large surface areas quickly, reducing cleaning time and boosting productivity. The 4,100 PSI maximum pressure ensures deep penetration for removing the toughest dirt, grease, and buildup. Whether you’re washing fleets of trucks, cleaning concrete, or maintaining agricultural machinery, the Centurion P10 delivers unmatched efficiency and results.

Performance Benefits:

• Faster cleaning cycles with high water volume.

• Penetrates grime and debris without excessive detergent use.

• Consistent pressure across all spray patterns and nozzles.

• Engineered for continuous, all-day operation.

Built to Run Cool, Clean, and Long

The belt drive system and low-RPM design keep the Centurion P10 running cool, even during long shifts. This not only extends the life of critical components but also allows it to operate efficiently in hot climates or enclosed areas. The pump’s max inlet temperature of 74°C (165°F) makes it compatible with warm water systems — ideal for degreasing and sanitizing applications where heat enhances cleaning power.

Combined with the thermal relief valve and high oil capacity crankcase, this pump is engineered for reliability under the harshest operating conditions.

Applications

The Centurion P10’s flow and pressure profile make it a top performer in a wide variety of professional cleaning scenarios:

• Fleet & Truck Wash Systems: High flow ensures quick rinsing and spotless results.

• Agricultural Cleaning: Perfect for tractors, sprayers, and barn maintenance.

• Industrial Plants: Cleans equipment, conveyors, and factory floors efficiently.

• Concrete & Construction: Ideal for surface prep, stripping, and restoration.

• Food & Beverage Facilities: Operates safely with hot water systems up to 165°F.

• Marine & Shipping: Handles hull cleaning and dock maintenance with ease.

Where others wear out, the P10 powers through.

Maintenance Made Simple

The Centurion P10 is designed for easy access and straightforward service, ensuring minimal downtime and lower long-term costs.

Maintenance Recommendations:

• Check oil level before each use; change after 50 hours, then every 500 hours.

• Keep belts properly tensioned and aligned.

• Inspect inlet filters and hoses regularly for clogs or leaks.

• Flush the chemical injector and pump with clean water after use.

• Monitor thermal relief valve and unloader for proper function.

With its external unloader and accessible fittings, the P10 is one of the easiest high-performance pumps to maintain, keeping your system running efficiently with little interruption.

Installation and Compatibility

The Centurion P10 is designed for quick installation in both OEM and aftermarket setups.

Installation Steps:

1. Mount the pump securely on a stable base or frame.

2. Align and tension the drive belts to manufacturer specifications.

3. Connect the 3/4" GHF inlet and 3/8" brass QC discharge lines.

4. Fill the crankcase with 37 fl oz of 30W non-detergent oil.

5. Ensure proper rotation direction (usually clockwise).

6. Adjust the external unloader for desired system pressure.

7. Test under load and verify flow and PSI output.

Once installed, the P10 delivers instant, consistent performance and is compatible with most industry-standard pressure washer systems.

Built for Endurance

The Centurion P10 combines high-pressure output with high flow, designed to outperform and outlast standard commercial pumps. Every element — from its hardened crankshaft to its brass manifold — is engineered for continuous-duty operation in demanding industrial settings.

Its belt-driven, low-RPM operation means it runs cooler and quieter, extending its service life far beyond typical direct-drive alternatives. For professionals who rely on their equipment daily, this translates to lower maintenance costs and maximum uptime.

Backed by a 7-Year Warranty

Confidence comes standard with the Centurion name. The P10 Belt Drive Triplex Pump is backed by a 7-year limited warranty, reflecting CP’s commitment to quality, craftsmanship, and reliability. Each pump is pressure-tested, flow-verified, and precision-calibrated before it leaves the factory to ensure flawless performance from day one.

This warranty isn’t just a formality — it’s a promise of long-term durability and dependable results, job after job.

Product Highlights

• Model: CTB2S (Centurion P10)

• PMR Part #: 85.129.171B

• Bare Pump #: 85.120.171B

• Drive Type: Belt Drive (Gas / Electric Compatible)

• Pressure / Flow: 4,100 PSI @ 8.5 GPM

• RPM: 1,750

• Manifold: Brass

• Plungers: Ceramic

• Unloader: External Adjustable

• Soap Injector: Adjustable

• Thermal Relief Valve: 85.300.022

• Oil Capacity: 37 fl oz (30W Non-Detergent)

• Weight: 40 lbs

• Warranty: 7 Years

The Centurion P10 Belt Drive Triplex 4100 PSI 8.5 GPM Pressure Washer Pump (85.129.171B) is built for professionals who require extreme power, reliability, and smooth performance in their cleaning systems. With a brass manifold, ceramic plungers, external unloader, and belt-driven 1,750 RPM operation, it provides the durability and efficiency needed for continuous-duty industrial applications.

Backed by a 7-year manufacturer’s warranty, this pump represents the pinnacle of Centurion’s engineering — blending strength, precision, and longevity in one exceptional package.

Centurion P10 — Industrial power perfected for professionals who demand more.