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Hyundai 4000psi Petrol Pressure Washer HYW4000P

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FREE UK DELIVERY Order by 2:30pm for same day dispatch (excludes weekends and bank holidays). Delivery in 1-2 working days.

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Powered by a Hyundai 420cc 4-stroke unleaded petrol engine: Provides easy starting, low emissions and reliable running in all weathers

Annovi Reverberi (AR) pump producing 4000psi: For longer life as well as outstanding performance and reliability

Low oil shutdown: Prevents engine damage due to lack of lubricant

Portable pressure washer: Fitted with puncture-proof wheels for easy mobility

Supplied with range of nozzles, trigger gun, lance and extra-long 15m hose: Get started straight out of the box

Range of uses: Can be mains cold water or gravity-fed

Peace of mind: 3 year Hyundai warranty* / 1 year commercial warranty* (terms apply)


4000psi Petrol Pressure Washer

The HYW4000P is a petrol powered pressure washer powered by the 420cc 14hp, 4-stroke Hyundai engine, which provides a maximum output of 4000PSI, and a massive flow rate of 15L/min, built for the toughest of cleaning tasks.

This petrol pressure washer model is favoured by cleaning professionals and used in industrial, agricultural and commercial environments. 

Powerful Pressure Washer

The Hyundai 420cc 4 stroke petrol engine has tremendous mid range torque so the jet washer does not have to be operated at maximum revs while cleaning. This makes for a more pleasant, quieter power washing experience and reduces fuel consumption, whilst promoting long engine life.

Fitted with the heavy-duty, Italian Annovi Reverberi (AR) RSV4G40 pump, this Hyundai power washer is designed to be able to handle constant hard work and provide a reliable performance. It also features a thermal relief valve for regulating the temperature and preventing the Annovi Reverberi pump from overheating.

The engine should be filled with 1.1L of SAE30 or 15w40 engine oil. To protect against the engine for added longevity, there is an engine cut out switch which operates if the engine oil is too low.

Portable Pressure Washer

As the largest Hyundai petrol pressure washer, it's also portable and well balanced, mounted on a solid base. Weighing just 61kg, the HYW4000P is easy to transport from one job to the next, which is essential for professional cleaners.

It’s also fitted with tough puncture proof tyres for easy movement across rough terrain, which makes this a truly portable pressure washer.

Petrol Jet Wash

This petrol jet wash's easy pull-start engine makes it especially convenient for use on jobs where no electricity is available.

A 15m hose and lance, 4 nozzles and a turbo nozzle are included as standard and changing the attachments couldn’t be easier due to the quick release fittings and connections.

Gravity Fed or Mains Supply

This Hyundai pressure washer is able to be both gravity fed and fed by a mains supply. It is recommended that the first time the pressure washer is used, it should be connected it to a mains supply to ensure all valves are free moving. After this, it is fine to use with a water butt or drum. It's not supplied with a suction kit, but is able to draw from a barrel.

If drawing uphill from a water butt, we suggest you use the following tips:

  • Ensure that the suction hose is 100% sealed against air leaks – any air drawn into the suction side of pump will prevent the machine from priming.
  • Connect the pressure washer to a mains water supply and run for 1 minute to free up any sticking valves.
  • Position the pressure washer as close to the water supply as possible.
  • On startup, to aid priming, prime the pump before connecting the high pressure hose to the pump outlet.

3 Year Warranty

For added peace of mind, this power washer is covered by a Hyundai 3 year platinum home-use warranty* / 1 year commercial warranty* (terms apply) including full parts and service backup to maintain your pressure washer for years to come.


Built in detergent tank
Draw from barrel
Drive type
Direct Drive
Engine oil
Engine oil capacity (ml)
Engine size (cc)
Engine type
Hyundai IC420 /4-Stroke
Frame material
Tubular Steel
Fuel capacity (l)
Fuel power source
Fully assembled dimensions
1080 x 630 x 800 (H x W x L) (mm)
Gravity feed
Gross weight (kg)
Hose length (m)
Mains supply
Max flow rate
15 L/min
Max pressure (bar)
Max pressure (psi)
Model ean
Net weight (kg)
Noise at 7m (db)
Packaged dimensions
810 x 640 x 660 (H x W x L) (mm)
Power (hp)
Product type
Pressure Washer
Annovi Reverberi RSV 4G40 Triplex
Speed (rpm)
Start method
Warranty (years)

Customer Reviews

Based on 7 reviews
Hilary Griffin
Very powerful

The delivery was speedy and assembly was straightforward. My patio looks immaculate - definitely a top-notch experience!

Ronald Lamb
A beast

I recently bought one of these at the end of the year, and it's an amazing piece of machinery. My original pump from Unionmarts Ltd was supposed to be 4800 PSI, but the TX850 was always breaking down. This new pump is of much higher quality and is a bit more expensive, but it more than makes up for it with its power. The customer service is top-notch and comes with a 3-year warranty - what more could I ask for? I tested it out near a phone box across from my house, where the pavement was really dirty - the perfect testing area. I wish I could have recorded a video to show how powerful it is!

Susanne Quick
Best product


Philip Barnes
Pressure washer 4000psi

I had been deliberating for weeks about this purchase, but I'm glad I finally decided to go ahead with it. The strength of the product is remarkable, and when combined with the whirlaway, it cuts the job time in half. The machine arrived on time and was easy to install, however, I would suggest including some oil with it as I had to wait an extra day to get some.

Sean Cregeen
All the power you need

Assembly is straightforward with clear instructions, and it functions smoothly with plenty of power. It appears to be very durable.