Centurion P4+ Direct Drive Triplex 3500 PSI 4.6 GPM Pressure Washer Bare Pump – 85.120.133B

Quiet, efficient, and built for precision — the Centurion P4+ electric triplex pump redefines smooth, reliable performance for professionals who demand consistency and longevity.

Engineered for Power, Efficiency, and Endurance

The Centurion P4+ Direct Drive Triplex Pump (85.120.133B) stands as one of the most refined pressure washer pumps in the professional cleaning industry. Designed by CP, a world leader in high-pressure pump manufacturing, this electric-driven powerhouse delivers 3,500 PSI at 4.6 GPM for outstanding cleaning performance with minimal noise and vibration.

Built around an electric motor–compatible direct drive system, the P4+ runs at a low 1,725 RPM, ensuring long-term durability and cooler operation compared to typical high-speed gas-powered units. Its brass manifold, ceramic plungers, and external unloader system work together to provide smooth, consistent pressure and reliable performance for years of heavy-duty use.

Whether installed on a stationary industrial washer, a wall-mounted unit, or a mobile electric system, the Centurion P4+ delivers precision cleaning power for professionals who expect efficiency, longevity, and reliability in every cycle.

Technical Overview

• PMR PART #: 85.129.133B

• BARE PUMP PART #: 85.120.133B

• PUMP MANUFACTURER: CP

• PUMP MODEL: CTE2S

• DRIVE TYPE: Direct Drive (Electric)

• SHAFT SIZE: 1 1/8"

• PUMP STYLE: Triplex

• MAX PSI: 3,500

• MAX GPM: 4.6

• UNLOADER TYPE: External

• PLUNGER (PISTON): Ceramic

• INLET SIZE: 3/4" GHF

• DISCHARGE SIZE: 3/8" Brass QC

• SOAP INJECTOR: Adjustable

• MANIFOLD TYPE: Brass

• RPM: 1,725

• MAX INLET TEMP: 60°C / 140°F

• THERMAL RELIEF VALVE: 85.300.023

• OIL CAPACITY: 13.3 fl oz

• OIL TYPE: 30W Non-Detergent

• WEIGHT: 17 lbs

• WARRANTY: 7 Years

Precision-Engineered for Professional Performance

The Centurion P4+ (CTE2S) was designed for professional users who require reliable performance, consistent power, and long operating life from their equipment. Its triplex plunger design ensures a smooth, pulse-free flow that maximizes cleaning efficiency while minimizing vibration and noise — perfect for electric motor applications where smooth operation and long duty cycles are essential.

Operating at 1,725 RPM, this low-speed pump runs significantly cooler than conventional 3,400 RPM direct-drive units, reducing wear and extending service intervals. The result is a pressure washer pump that’s not only powerful but also remarkably quiet and efficient — the ideal choice for indoor use, maintenance facilities, and continuous cleaning operations.

Key Features

Triplex Ceramic Plunger System

At the core of the Centurion P4+ is its triplex plunger design, featuring three precision-balanced ceramic pistons that move in perfect synchronization. Ceramic plungers resist corrosion, minimize friction, and disperse heat efficiently — reducing wear on seals and extending pump life, even during extended operation.

This triplex system delivers a smooth and stable water flow, eliminating pressure fluctuations common in lower-quality pumps, and allowing for a more consistent cleaning experience.

Industrial-Grade Brass Manifold

The solid brass manifold is engineered for durability and corrosion resistance. Unlike lightweight cast or aluminum housings, brass maintains its structure and sealing integrity under high pressure and temperature fluctuations. This ensures leak-free performance and long-term reliability, even in demanding industrial environments.

External Unloader Valve

The external unloader gives operators fine control over system pressure while simplifying maintenance. Easy to access and adjust, this feature allows for quick pressure calibration between tasks — from gentle rinsing to aggressive surface cleaning. It also enhances cooling during bypass cycles, preventing overheating when the trigger gun is not engaged.

Adjustable Soap Injector

The adjustable chemical injector allows for precise detergent application, giving you complete control over cleaning solution concentration. Switch easily between detergent and high-pressure rinse modes for efficient, seamless operation.

Thermal Relief Valve Protection (85.300.023)

The integrated thermal relief valve automatically releases overheated water when the pump runs in bypass mode, preventing internal damage from heat buildup. This safety feature keeps your pump cool, protecting seals and valves from thermal stress and extending overall service life.

Compact Direct Drive Design

The P4+ uses a direct drive configuration, connecting directly to an electric motor via a 1 1/8" shaft. This design reduces vibration, simplifies installation, and eliminates the need for belt tensioning or alignment. With fewer moving parts, it offers lower maintenance and a smaller overall footprint — ideal for compact or stationary systems.

Built for Industrial and Commercial Applications

The Centurion P4+ is designed for professional users who rely on high-output cleaning performance and efficiency. Its 3,500 PSI pressure rating and 4.6 GPM flow make it versatile enough to handle a wide variety of heavy-duty cleaning tasks.

Common Applications Include:

• Industrial Cleaning: Machinery, production lines, and manufacturing equipment.

• Automotive & Fleet Washing: Buses, trucks, and transport fleets.

• Food & Beverage Facilities: Sanitary washing with warm water compatibility.

• Property & Building Maintenance: Cleaning walls, sidewalks, and façades.

• Agricultural & Equipment Washdown: Barns, tractors, and implements.

• Marine & Dock Cleaning: Corrosion-resistant design handles salt exposure well.

With its quiet electric operation, the P4+ is also perfect for indoor facilities, car washes, and environments with noise restrictions — offering powerful performance without disruption.

Efficiency and Quiet Operation

The electric motor compatibility and low 1,725 RPM operation make the P4+ exceptionally quiet and efficient. Unlike gas-powered systems that generate significant noise and vibration, this pump’s balanced design ensures a smooth, consistent output that’s ideal for precision cleaning in noise-sensitive environments.

Running cooler also means less wear on critical components, extending seal and bearing life. The 13.3 fl oz oil capacity provides sufficient lubrication for all moving parts, while the 30W non-detergent oil ensures consistent performance under high-load conditions.

Durable Construction

Every component of the P4+ is built to last, from the precision-ground crankshaft and oversized bearings to the heavy-duty seals and brass manifold. The result is a pump that can handle continuous-duty operation in the toughest commercial environments.

Durability Highlights:

• Hardened steel crankshaft for maximum longevity.

• Oversized ball bearings for smoother operation.

• Ceramic plungers for corrosion and abrasion resistance.

• Reinforced seal pack for leak-free operation under pressure.

• Precision-machined valve cages for efficient flow.

With proper maintenance, this pump can provide thousands of hours of reliable service, even in demanding industrial use.

Maintenance Made Simple

The Centurion P4+ is designed for easy serviceability, allowing operators and technicians to perform regular maintenance quickly and without specialized tools.

Maintenance Tips:

• Check oil level before each use. Replace after the first 50 hours, then every 500 hours.

• Ensure inlet filters are clean and free from debris.

• Flush the soap injector and water lines after chemical use.

• Keep inlet temperature below 60°C (140°F) for optimal seal performance.

• Inspect fittings, hoses, and unloader valve regularly for leaks.

By following these simple steps, operators can extend the lifespan of their P4+ and ensure peak efficiency.

Installation and Compatibility

Installing the Centurion P4+ is straightforward. It’s compatible with most standard electric motors with a 1 1/8" shaft and operates optimally at 1,725 RPM.

Installation Steps:

1. Mount the pump securely to the motor flange using the proper alignment bolts.

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

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

4. Fill the crankcase with 13.3 fl oz of 30W non-detergent oil.

5. Prime the system before operation to remove air from the lines.

6. Adjust the unloader to your desired pressure level.

Once installed, the pump is ready for continuous, efficient operation — perfect for daily use in professional cleaning environments.

Performance You Can Depend On

The Centurion P4+ provides a powerful 3,500 PSI output at 4.6 GPM, making it ideal for medium-to-heavy-duty cleaning jobs that demand consistent, professional-grade pressure. Its low-speed operation reduces wear and tear while maintaining excellent flow and cleaning coverage.

This combination of pressure, flow, and efficiency makes it suitable for a variety of applications — from precise equipment cleaning to industrial-scale surface washing.

Built for Long-Term Reliability

Durability is built into every Centurion pump. The brass manifold, ceramic plungers, and precision seals ensure leak-free operation even under the most demanding conditions. Combined with its low-RPM design and electric motor compatibility, the P4+ is one of the most durable and cost-effective solutions in its performance class.

Every pump undergoes rigorous quality assurance testing for pressure stability, flow rate accuracy, and seal integrity before leaving the factory. This ensures that each unit performs perfectly out of the box, ready for years of professional service.

Backed by a 7-Year Warranty

The Centurion P4+ is covered by a 7-year manufacturer’s warranty, providing peace of mind that your investment is protected. This warranty reflects CP’s commitment to producing pumps that exceed professional expectations for reliability and performance.

When properly maintained, this pump will deliver long-term service far beyond standard warranty periods, ensuring you get the most out of your equipment.

Product Highlights

• Model: CTE2S (Centurion P4+)

• PMR Part #: 85.129.133B

• Bare Pump #: 85.120.133B

• Drive Type: Direct Drive (Electric)

• Pressure / Flow: 3,500 PSI @ 4.6 GPM

• RPM: 1,725

• Manifold: Brass

• Plungers: Ceramic

• Unloader: External Adjustable

• Soap Injector: Adjustable

• Thermal Relief Valve: 85.300.023

• Oil Capacity: 13.3 fl oz (30W Non-Detergent)

• Weight: 17 lbs

• Warranty: 7 Years

The Centurion P4+ Direct Drive Triplex 3500 PSI 4.6 GPM Pressure Washer Bare Pump (85.120.133B) delivers professional-grade cleaning power in a compact, low-RPM electric configuration. With a brass manifold, ceramic plungers, external unloader, and adjustable soap injector, it provides unmatched performance and reliability for both stationary and mobile cleaning systems.

Running at a quiet 1,725 RPM, this pump combines precision engineering with industrial durability for continuous, long-life operation. Backed by a 7-year manufacturer’s warranty, the P4+ is the trusted choice for professional-grade electric pressure washing systems that demand superior performance, low maintenance, and extended service life.

Centurion P4+ — Power refined. Performance perfected. Built to run cooler, cleaner, and longer.