Centurion P4 Direct Drive Triplex 4400PSI 4.2GPM Pressure Washer Pump - 85.179.175B

Built for the Bravest, Engineered for Extreme Performance

The Centurion P4 Direct Drive Triplex Pump (85.179.175B) - This is the powerhouse you turn to when raw pressure, serious flow, and reliability are all on the line. We designed this pump for pros who know what they need to get the job done - top-notch professionals who aren’t afraid to push their equipment to its limits. The P4 pumps out 4400 PSI and 4.2 GPM - that's brute force combined with precision engineering that won't quit. It’s built by CP (Centurion Pump) and backed by a rock-solid 7-year warranty - this pump is built to tackle the toughest jobs on your toughest sites, from heavy-duty fleet washing to construction, agriculture, and property maintenance.

Whether you're swapping out a worn pump, upgrading your gear, or building a top-shelf pressure washer, the Centurion P4 is the clear choice for power, precision, and real endurance. It’s not just a component - it's the heartbeat of a high-performance cleaning system.

Key Features

• Model Number: Centurion P4 – CP CTG2

• Part Number: 85.179.175B

• Pump Type: Triplex - Direct Drive - Gas Engine Compatible

• Drive Type: Direct Drive – Connects Directly to A 1" Gas Engine Shaft

• Shaft Diameter: 1"

• Maximum Pressure: 4400 PSI

• Maximum Flow: 4.2 GPM

• Pump RPM: 3450

• Unloader Type: Adjustable Pressure Built-In

• Chemical Injector: Fixed

• Manifold: Brass

• Plunger Material: Ceramic

• Inlet Port: 3/4" GHF (Garden Hose Fitting)

• Discharge Port: 3/8" Brass Quick Connect

• Thermal Relief Valve: 85.300.022

• Oil Type: 30W Non-Detergent

• Oil Capacity: 16 fl oz

• Max Inlet Temperature: 60°C / 140°F

• Weight: 14 lbs

• Warranty: 7 Years

Additional Features

• Adjustable pressure built-in unloader for easy pressure control

• A fixed chemical injection port because you should be in charge of how much cleaning agent you use

• Quick connect high-pressure hose outlet makes setup a snap

• 3/4" inlet for a garden hose - for easy hook up

• Brass manifold - because brass doesn't break down or corrode

• Oil fill port for easy maintenance - you don’t want to be stuck changing your oil in the middle of a job

• Thermal relief valve - so you don't burn out your pump

Engineered for the Pros Who Demand More

When the job calls for tough, the Centurion P4 answers. With 4.2 gallons per minute of flow and a maximum pressure of 4400 PSI, this pump has got it all - the perfect balance between volume and force. That means it's perfect for washing big equipment, concrete, fleets, and heavy machinery.

It's built around a triplex piston design - three ceramic plungers moving in smooth sync to generate consistent high-pressure water flow. Ceramic construction beats steel hands down for resisting heat, corrosion, and wear.

The brass manifold and forged aluminium crankcase deliver the strength you need - plus minimal vibration and wear, and the Centurion P4 is one of the most durable and stable triplex pumps out there.

Precision Meets Longevity

The Centurion P4’s triplex design is the best - a crankshaft-driven piston system for superior performance, longer life and smoother operation. Unlike those axial pumps that just use a simple wobble plate, this pump's got the sophistication of automotive tech.

Each ceramic plunger moves through tight seals to keep the pressure up and the leaks down, while the oversized bearings distribute stress evenly. The result is a pump that not just performs well but lasts longer, even when used all day every day.

And the direct-drive design means it plugs into a 1" gas engine shaft with no fuss, making for a compact, efficient setup with fewer moving parts.

Built-In Adjustable Unloader

The P4’s built-in pressure unloader is one of its handiest features - with an easy to use quick-adjust control knob, you can dial in your PSI to suit your cleaning needs - no matter what you're washing.

The unloader automatically diverts water when you release the trigger gun, reducing stress on the pump and stopping it from overheating. And since it’s built in, you don’t need to worry about plumbing or leak points.

With this pump you get a reliable system that can handle anything from delicate surface cleaning to heavy-duty industrial washing - and it’s easy to set up, too.The fixed soap injector makes applying detergents or degreasers to your pressure washer a whole lot easier. By sucking in cleaning chemicals right into the low-pressure water stream, the P4 gives you a serious boost in cleaning power when it comes to oil, grime, and stains - which is a must if you're working with vehicle detailing, equipment maintenance or industrial cleaning.

This means a lot less hassle and waste of time getting rid of nasty buildup on equipment or vehicles. Combining the P4's high-pressure output with that powerful injection feature, even the most hardcore grime doesn't stand a chance.

Stacked Power in a Tiny Package

The Centurion P4's got the design to deliver major cleaning power in a compact form. Because the pump is right there bolted to the gas engine's shaft, you don't need all sorts of belts, pulleys or gear reductions - just plain old mechanical efficiency.

This means:

• Less clunking and rattling around

• Better power efficiency

• Easier setup

• Cut your maintenance costs down

Perfect for mobile wash rigs, building sites, or service vans that need a whole lot of cleaning power on the go, this pump packs professional power into a lightweight 14 lb frame that's easy to move and mount.

Overheat Protection for Long Life

The included thermal relief valve (85.300.022) is an absolute essential for protecting your pump from overheating. When you've got the trigger gun shut and water's recirculating through the pump, things can get hot fast. But the thermal relief valve kicks in automatically to dump out the hot water and bring in cooler stuff from the inlet - keeping things running safely.

All this means a longer-lasting pump, protects the seals from damage, and makes sure you get steady performance even with heavy use.

Built for Tough Use

The Centurion P4 is built to handle whatever you throw at it. Even with water temperatures of up to 140°F (60°C), it keeps on trucking. And with a high-pressure capable big brass manifold - which resists corrosion and pitting - you've got a pump that can take the heat.

The precision-machined internal parts are built to keep their tolerances under the high pressure, and the crankcase is filled with 30W non-detergent oil that keeps everything running cool and lubricated - even in the long sessions.

Every single component has been chosen with the long-term prospects of the operation in mind - so you know it'll keep on going for years to come.

Made for the Pros

The Centurion P4 is designed for pros who need reliable, high-powered cleaning on the job. With a flow rate of 4.2 GPM, you can clean faster and more effectively, and the 4400 PSI pressure cuts through grime and grease with ease.

Some of the Jobs This Thing's Made for:

• Washing large fleets of vehicles

• Cleaning heavy equipment

• Maintenance and repair for agricultural machinery

• Bringing old buildings and concrete back to life

• Cleaning factories and industrial spaces

• Keeping construction sites tidy and clean

• Removing graffiti

• Preparing surfaces for painting or coating

This pump lasts in the toughest conditions where other units would fail. It's built to perform day in and day out, no matter the weather or the job.

Strength Meets Efficiency

Every time the Centurion P4's pistons go through their stroke cycle, you get a smooth, consistent and efficient flow of water. The triplex crankshaft system makes sure there's less vibration, steady pressure and less energy lost - which means a smoother ride all round and less wear on your pressure washer system.

Since the pump runs at 3450 RPM, it plays perfectly with those commercial engines like Honda GX390, Powerease 420, Kohler CH440 and Briggs & Stratton XR Professional series. Putting it in is a breeze, and the result is a pump-engine combo that delivers pro-grade results all day long.

Easy Maintenance All the Way

Every bit of the Centurion P4 has been made to last, but it's still worth taking care of your pump to keep it running at its best. The oil fill port lets you in for fast, mess-free service, and the 16 fl oz crankcase capacity gives you a whole lot of lubrication to handle the heat and friction from all that heavy use.

Regular oil changes using 30W non-detergent oil keep your internal components running smoothly, the built-in unloader and thermal relief valve reduces mechanical stress, and prevents overheating, so long-term maintenance costs are way down.

Replacement seals, valves and plungers are all super accessible and user-serviceable, giving you years of continued performance with minimal downtime.

Top-Grade Materials For Top-Grade Results

Every single material used in the Centurion P4 has been picked for its strength, precision and reliability:

• Ceramic Plungers: Can take the heat and wear and tear of heavy use without breaking down.

• Brass Manifold: Resists corrosion and pitting, and handles high pressure with ease - even under thermal stress.

• Hardened Steel Crankshaft: Precise machining ensures balance and smooth running.

• High-Quality Seals and Bearings: Reduce friction and wear - and make sure you don't have leaks.

The Centurion P4 : A Pump that's Built to Last

This combination of high quality materials ensures the P4 wont just perform at a high level, but keeps on doing so year in year out, without falling apart like so many cheaply made consumer-grade pumps.

Trusted by Professionals the World Over

The Centurion name is an absolute byword for power, precision & reliability . And it's no surprise that every P4 pump comes with decades of engineering expertise behind it as part of the deal . So - wherever you are in the world - you can have the same level of quality that's trusted by professional cleaning gangs , equipment manufacturers & contractors alike.

That 7 year guarantee is just the icing on the cake - in reality it's an ironclad promise of top-notch craftsmanship and a whole lot of confidence in every single component that goes into every P4. When you invest in the Centurion P4, you're getting a pump that's designed to do better and last longer than anything else on the market.

Why Do We Recommend the Centurion P4 ?

If you're serious about cleaning like a pro, then the P4 is the pump for you. You get industrial strength power, fantastic efficiency and total dependability all bundled up in a compact 14 pound package that's a piece of cake to mount and service.

Whether you're looking to upgrade your kit, expand your business or just replace a dodgy pump , the Centurion P4 is the ultimate solution. It's not just built to be tough - it's built to be relied upon by the people who really need their equipment to work every single day.

The Centurion P4 Direct Drive Triplex 4400 PSI 4.2 GPM Pressure Washer Pump (85.179.175B) is the very epitome of what you'd expect from a top-notch engineering effort. You get adjustable pressure, a built in unloader, fixed chemical injection and a brass manifold that's built to take on the toughest cleaning jobs with ease.

Delivering 4400 PSI, 4.2 GPM & a rock solid reliability the P4 is without a doubt the number one choice for any commercial or industrial cleaning pro who needs a pump that can keep up with them day in day out.

With ceramic plungers, a thermal relief valve & that 7 year warranty, the Centurion P4 is more than just a replacement - it's a major upgrade in power, precision & peace of mind.

Centurion P4 : Power that really lasts, performance that really stands out.