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The Kärcher K4 is a powerful and mobile unit ideal for all cleaning tasks around the home. The K4 comes with a Vario Power Lance, universal detergent and water-cooled motor.

K4 11801510 https://www.kaercher.com/uk/home-garden/pressure-washers/k4-11801510.html
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  • Pressure washer: For cleaning bicycles.
  • Pressure washer: For cleaning gardening machines and tools.
  • Pressure washer: For cleaning garden, patio or balcony furnitures.
  • Pressure washer: For cleaning fences and smaller garden paths or flagstones.
  • Pressure washer: For cleaning motorcycles and scooters.
  • Pressure washer: For cleaning small cars.

The Kärcher K4 Pressure Washer combines power with an innovative water-cooled induction motor for enhanced performance and longer life. Matching its power and design, the Quick Connect hose system efficiently eliminates kinking and reduces set up times, making it a convenient solution for cleaning your home. The K4 includes a Vario Lance, detergent suction hose and Dirtblaster Lance which provides up to 50% greater cleaning power than a standard high pressure lance. The K4 pressure washer’s plug & clean detergent system makes it simple to use and easy to switch between a low pressure detergent application and a high pressure wash jet. With an upright design, wheels and a long handle, the Kärcher K4 ensures excellent mobility. An impact-resistant casing and fine mesh water filter prevent dirt particles from damaging the motor and three-piston axial-flow pump, whilst a safety valve prevents pressure overload. All Kärcher K4 pressure washers can work using a static or harvested water source drawn using a Kärcher suction hose and filter, or connected to a water butt tap. The K4 comes with a 3 year guarantee.

Features and benefits
Pressure washer K4: Outstanding performance
Outstanding performance
The K4 Compact Home’s state-of-the-art water-cooled motor will impress you with its long life, performance and high quality results.
Pressure washer K4: Plug and Clean
Plug and Clean
Thanks to Plug 'n' Clean, the cleaning agent can be replaced quickly and conveniently with just one simple movement.
Pressure washer K4: Quick Connect
Quick Connect
The high-pressure hose is easy to manoeuvre. With the Quick Connect system, you can click quickly in and out of the pressure washer and gun, saving you time and effort.
Compact and tidy storage
  • Not all living spaces come with generous storage space. The Kärcher K2 home jet washer’s upright design saves you space, while the on-board storage solutions keep your Kärcher accessories, cables plus hose and trigger gun stored neatly on the machine.

Technical data

Pressure (bar/MPa) 20 - up to 130 / 2 - up to 13
Flow rate (l/h) max. 420
Max. water feed temperature (°C) max. 40
Voltage (V) 230
Power rating (kW) 1.8
Area performance (m²/h) 30
Weight without accessories (kg) 11.8
Dimensions (L x W x H) (mm) 300 x 394 x 876


  • Detergent, Universal cleaner, 1 L
  • High-pressure gun, Standard Quick Connect
  • Vario Power spray lance
  • Dirt Blaster spray lance
  • High-pressure hose, 6 m
  • Quick Connect on machine
  • Detergent application via, Plug and Clean system
  • Telescopic handle
  • Water-cooled motor
  • Integrated water filter
  • Adapter garden hose A3/4"
Pressure washer K4
Pressure washer K4

K4 is rated 4.2 out of 5 by 20.
Rated 4 out of 5 by from Excellent performance but short on accessories. For years I resisted buying a pressure washer, as I could not see how pressurised water could clean better than an old fashioned scrub with brush and detergent. When I did decide to buy the K4 I was amazed by its performance, cleaning ingrained concrete, block pathways and wooden garden furniture, even without using the detergent supplied with the washer. However, this is one of the more expensive models and as such it is disappointing that accessories to clean patio areas and cars have to be purchased separately. A friend bought the cheaper K2 and I borrowed his (included) patio cleaner, which was very effective. I have not found a friend with the car kit yet!
Date published: 2015-09-30
Rated 4 out of 5 by from K4 pressure washer up grade This is the 3rd karcher I have had in 25 years I just wear them out. All have performed with minamual maintanence with the odd hose or connection replacement. I choose this model as I was on a budget and had all the features I needed plus I could use the attachments from my old washer. The plastic casing Dose not appear to be as good/strong as the last unit but then thats progress. preformance is good and I like the chemical bottle drop in system. Just need to judge the amount of cleaner on the dial to a reasonable ratio to water. So far cleaned a large patio plus 2 cars several times with good results
Date published: 2015-09-30
Rated 3 out of 5 by from good but not brilliant since using this washer for the car and the patio there have been a couple of things. One, the dirt blaster lance failed after around 12 uses and i had to buy another one because i couldn't find my product docs, and they are not exactly cheap. The circulating car washer head is a complete waste of time and again expensive. If you haven't got one of these and are thinking to purchase one i would advise against it. Some of the patio flags hadn't been properly cleaned for some time prior to using the dirt blaster lance and to be honest i wasn't expecting them to come up like new but it didn't clean as well as i would have expected, but all in all not a bad product. However, if i was looking again i would certainly give more attention to other products out there before buying
Date published: 2015-09-26
Rated 3 out of 5 by from Could be better I bought this K4 in 2013 for domestic use ie; cleaning a large patio every 6 months + washing the car monthly. It is now worn out, the pressure is now too reduced to effectively clean my patio.
Date published: 2015-09-28
Rated 1 out of 5 by from Not happy at all! Complete waste of money! I bought one of these at the end of 2014 as a Christmas present for the other half and we had great hopes it would give us years of reliable service. After all Karcher has a great reputation for quality. I did not keep the receipt all this time as we had just moved house and we have had several clean outs since then, and anyway it would only have a 1 year guarantee. So now it is November 2016, we haven't used it very often and it is kept in the frost-free garage and we just took it out to clean the car and it just doesn't work! My husband is absolutely livid! I hadn't realised how much he appreciated his gift! Either way this has been a complete disappointment and a complete waste of nearly £200. I will find a replacement form another company!
Date published: 2016-11-14
Rated 5 out of 5 by from Fabulous Machine I have had my k4 for about 2yrs and it's never let me down it gets used a lot. I love the K4 because of the amount of pressure that it provides. Fantastic.
Date published: 2015-09-30
Rated 5 out of 5 by from simply the best This is the second karcher washer I have purchased
Date published: 2015-10-20
Rated 5 out of 5 by from Great pressure washer I have had this product for sometime and is brilliant, it is the best pressure washer I have ever purchased. Good value and Karcher customer service is second to none. I purchased this machine knowingly with damaged wheels and got a good discount, contacted Karcher to try and by some wheels which they sent free of charge. So it will be Karcher for me in the future.
Date published: 2015-09-29
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