PRODUCT
DESCRIPTION
High Flow, High Pressure & High Performance
The Centurion P8 Belt Drive Triplex Pump (85.129.190B) is built for pros who aren't willing to settle for anything less than top-notch power, durability & precision. Engineered by Centurion Pump, this industrial-grade pump packs a serious punch - 3,500 PSI & 5.5 GPM of power that's perfect for commercial & industrial cleaning jobs that need that extra oomph.
With a belt drive system, triplex ceramic plunger design and a nickel-plated brass manifold, the Centurion P8 is the epitome of performance engineering. Designed for both gas & electric drive systems, it’s the ultimate upgrade for operators who demand a pump that runs cooler, lasts longer & performs flawlessly even in the toughest conditions.
Whether you're washing fleets, maintaining heavy equipment or restoring concrete - this pump delivers the strength, control & reliability you need to tackle the toughest cleaning jobs and get the job done right.
Key Features
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Model: Centurion P8 (CP CTB4S)
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PMR Part #: 85.129.190B
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Bare Pump Part #: 85.120.190B
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Pump Manufacturer: Centurion Pump
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Drive Type: Belt drive
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Pump Style: Triplex
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Shaft Size: 24mm
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Max Pressure: 3,500 PSI
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Max Flow: 5.5 GPM
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Unloader Type: External (adjustable)
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Plunger Material: Ceramic
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Inlet Size: 3/4" Garden Hose Fitting (GHF)
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Discharge Size: 3/8" Brass Quick Connect
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Soap Injector: Adjustable
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Manifold Type: Nickel-plated brass
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RPM: 1,450
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Max Inlet Temperature: 60°C / 140°F
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Thermal Relief Valve: 85.300.024
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Oil Capacity: 32 fl oz
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Oil Type: 30W non-detergent
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Weight: 27.5 lbs
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Warranty: 7 Years
Built to Withstand a Lifetime of Use
The Centurion P8 is the top-of-the-line when it comes to professional pressure washer pumps. Its triplex ceramic piston design is built for smooth, consistent, high-pressure water output - perfect for the toughest cleaning jobs. The belt drive system reduces pump RPM & vibration, extending the life of all the internal components.
Running at 1,450 RPM, the P8 is way cooler & quieter than those direct-drive systems - ideal for long cleaning sessions. In fact, it's the go-to choice for professionals who need to get the job done right every time.
The Power of Triplex - The Standard for Pros
At the heart of the P8 is Centurion's precision-engineered triplex plunger system, featuring three high-strength ceramic pistons that are driven by a forged brass crankshaft. This design delivers constant, balanced pressure output - the key to long-lasting performance.
Each ceramic plunger is super resistant to heat, abrasion & chemical corrosion - a must-have for industrial cleaning environments where water temps & detergent concentrations fluctuate.
Triplex pumps are the gold standard in commercial pressure washers - and the P8 is the ultimate expression of this tech. It delivers high output & precision engineering in one sleek package.
Why the Belt Drive Matters
The belt drive system separates the engine or motor from the pump, using pulleys & a drive belt to reduce pump RPM to 1,450 & minimize direct vibration. This reduces wear & tear on the pump, runs cooler & enables continuous operation for long cleaning cycles.
By running at lower RPM, the pump experiences less friction, less heat buildup & dramatically longer seal life. For pros, this means less downtime, lower maintenance costs & longer equipment lifespan.
Nickel-Plated Brass Manifold - Built to Last a Lifetime
The P8’s nickel-plated brass manifold sets a new standard for corrosion resistance & durability. While standard brass manifolds are strong, the addition of a nickel plating layer provides an extra layer of protection against oxidation, detergent chemicals & high water temps.This ensures the manifold holds up over the long haul - even in the toughest environments such as out at sea, or where chemicals are being used to clean, or in super damp conditions. Plus the Centurion’s high-tolerance machining inside really pays off in terms of sealing and pressure retention over many years of heavy use.
High-Flow Power: 5.5 GPM at 3,500 PSI
We're talking serious cleaning power here - the Centurion P8 will deliver 5.5 gallons per minute at 3,500 PSI and is built to tackle the toughest commercial and industrial cleaning jobs out there. The pump's got a high flow rate, which means you can blast clean big surfaces like trucks, heavy machinery, industrial floors, or construction sites in a fraction of the time it used to take - and you can actually see what you're doing because the coverage is so good. This is perfect for washing everything from farm equipment to food service gear, to construction vehicles and more.
You get a nice balance between pressure and volume - enough to knock deep stains out, but not so much that you waste water or wear out the pump. When you pair it up with the right nozzle configuration, the P8 can handle just about any cleaning job you throw at it.
Some of the specific applications the P8 handles with ease include:
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Heavy-duty surface cleaning
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Stripping paint from metal surfaces
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Restoring concrete, brick, and steel
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Degreasing equipment
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Washing fleets of vehicles
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Cleaning agricultural and food service gear
Adjustable External Unloader
The external unloader gives you complete control over water pressure, which is a big deal when you're dealing with different cleaning applications - you might need to dial it back for delicate surfaces, but still want to blast away tough stains. The unloader also looks out for the pump by relieving pressure when you release the trigger gun, which keeps it from overloading and wearing out faster.
It's also super easy to maintain - the external design means you can get in there and adjust everything without having to take the pump apart.
Adjustable Soap Injector
The P8 has an adjustable chemical injector that lets you dial in the perfect amount of detergent for whatever job you're working on. That means you can get more effective results with less soap, which saves you money and also helps the environment.
With this adjustable system, you've got complete control over chemical draw rate and dilution - exactly what you need to get the job done right.
Overheat Protection with Thermal Relief Valve
When the pump is idle (which happens when you release the spray trigger), water starts to recirculate inside the pump. Without any flow to cool it down, that water can get hot pretty fast - which is a leading cause of pump failure. To fix that, the Centurion P8 comes with a thermal relief valve (85.300.024) that kicks in and releases overheated water when it gets too hot. This allows cooler water to come in and keep the pump running safely.
This simple but vital feature keeps the seals, valves, and pistons safe from heat damage, which means the pump lasts longer and stays reliable.
Built to Last: Precision-Built for Longevity and Stability
Every component of the Centurion P8 is built with the long haul in mind - we're talking forged brass heads, ceramic plungers, oversized bearings and heavy-duty seals. That's a pump that's designed to keep on going no matter what you throw at it.
We're talking a 32 fl oz crankcase oil capacity and 30W non-detergent oil to keep things running smoothly and coolly even in the long cleaning sessions. The nickel-plated brass manifold, hardened steel crankshaft, and high-grade seals all work together to give you a pump that will just keep on going.
It weighs in at 27.5 lbs, so it's got the heft you need, but it's not so big it's unwieldy. The P8 is just plain tough.
Ideal Applications
The Centurion P8 Belt Drive Pump is for people who need a pump that will just plain keep up with their cleaning jobs. It's got the power and the flow to blast away grease, grime, and dirt - whether it's for your fleet, your farm, or your construction site.
Some of the specific applications where the P8 shines include:
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Washing fleets of vehicles
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Cleaning agricultural and food service gear
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Construction and industrial site cleaning
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Equipment rental and service applications
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Concrete surface preparation and restoration
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Large-area surface cleaning with multiple nozzles
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Commercial car washes and maintenance operations
Cooler Running. Longer Life.
With our belt-drive design and low 1,450 RPM operation, the P8 stays cooler and operates longer. Most pumps out there are direct-drive - which means they're running at engine speed (usually 3,400+ RPM). That's way too hot for any pump to handle - it wears out parts, makes noise and vibration, and generally just isn't worth it. Not with the P8.
Our lower RPM reduces wear and tear, and also just makes it a more comfortable unit to be around - less noise and less vibration.
Easy Maintenance and Serviceability
We designed the Centurion P8 with maintenance in mind. The external unloader and oil fill port make it super easy to get in and service the pump without having to tear it apart. And with the sight glass window, you can quickly check the oil level without having to remove any panels.
We built this pump with long service intervals in mind - those oversized bearings and high-quality seals just plain last longer. Changing the oil is also a snap, and parts and rebuild kits are widely available so you can keep on going.
Keep in mind that we also figured that you might actually like to change the oil regularly, so we included a 32 fl oz crankcase oil capacity and 30W non-detergent oil to keep things running smoothly. That's a lot of oil, but trust us, it's worth it.## Precision Engineering by Centurion Pump
The P8 pressure washer pump, built by Centurion Pump, has been crafted over decades of experience in designing and manufacturing top-notch pressure washer pumps. Each unit gets put through its paces in rigorous quality control tests and performance checks to make sure it performs flawlessly under all sorts of conditions - scorching hot temperatures, high pressure and heavy loads.
Each and every pump that leaves the factory has been built to meet the highest standards for dependability, efficiency and raw power output. And that's why the P8 is the pump that serious cleaning professionals trust - one that just keeps on delivering day in and day out with minimal running time lost to breakdowns and maximum dependability to be had.
Backed up by a 7-year guarantee, the P8 shows Centurion's commitment to delivering a first class product that will keep going strong for years to come - that's what you get when you go with the P8.
Why Choose the Centurion P8 Pump
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A Real Workhorse: * High Flow, High Pressure: 5.5 GPM at 3,500 PSI – built for use on serious industrial-grade cleaning projects.
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The Belt Drive Makes a Big Difference: Runs cooler,quieter, and longer without breaking a sweat and with much less vibration than some other pumps.
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Triplex Design for Smooth Operation: Consistently delivers smooth, steady water flow with a lot less wear on the pump.
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Tough as Nails: Nickel-Plated Brass Manifold for serious corrosion resistance so it keeps on going year after year.
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Make it Easy to Service it: External unloader - adjustable for just the right amount of pressure control and easy to maintain too.
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Chemical Flexibility: Adjustable soap injector - for tackling all sorts of cleaning tasks.
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Run it Lower, Longer: 1,450 RPM - that means less heat and a longer life for the pump.
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Protect it From Overheating: Thermal relief valve - safeguards the pump against overheating during bypass.
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7-Year Warranty: the P8 has you covered - that's peace of mind you can bank on from a name that pros trust.
The Centurion P8 Belt Drive Triplex 3500 PSI 5.5 GPM Pressure Washer Pump (85.129.190B) - a absolute powerhouse of precision engineering and industrial strength. Built for the toughest cleaning jobs out there, it delivers consistent high pressure, high flow, and rock-solid reliability for the pros.
This pump stands out from the crowd with its belt-drive system for cooler,quieter operation, a nickel-plated brass manifold for serious corrosion resistance, and a triplex ceramic plunger design for top-notch efficiency and longevity. No wonder it's the clear number one choice for contractors and industrial cleaners who demand the best.
With an external unloader, adjustable soap injector and a 7-year warranty, this pump is a real winner - unmatched performance and peace of mind all day long. That's what you get with the P8 - job after job, year after year.
The Centurion P8: built to power through even the toughest cleaning challenges.