In a nutshell

A BBC Gardeners' World Magazine Best Buy award winner this simple, comfortable-to-use washer shifts dirt with ease - the included patio cleaner works like a dream, powering splash free across neglected surfaces. It has a choice of nozzles, comes with a sample of patio detergent and a three year warranty, if bought directly from Karcher.

What we tested

  • Set up/storage
    A star rating of 4.0 out of 5.
  • Ease of use
    A star rating of 5.0 out of 5.
  • Performance
    A star rating of 5.0 out of 5.
  • Value for money
    A star rating of 5.0 out of 5.
Overall Rating
A star rating of 4.8 out of 5.


  • Powerful patio and surface cleaner
  • Comfortable to use
  • Integrated detergent feed
  • Good choice of sprays


  • Needs more assembly than many

What are the main features of the Karcher K3 Home pressure washer?

The Karcher K3 has a 1600w engine, a water flow rate of 380 litres per hour and delivers 120 Bar of pressure. It has wheels and two handles, including one on the front, which make it easy to lift and move around as does its weight. It has a six metre hose and comes with both a variable spray lance and a dirt blaster spray plus it has an extension lance so there's no need to bend over as you work and put strain on your back. The body of the washer has an integrated detergent tank and onboard storage for the cable, hose and lances plus a patio cleaner and a sample of patio and deck cleaner are included.

What’s the Karcher K3 Home pressure washer like to use?

This needed the most assembly of all the pressure washers in our test - the wheels, handles and onboard storage all need attaching with a screwdriver. This takes about 10 - 15 minutes but there are clear instructions showing what you need to do. Once built, it’s simple to use with easy, click-on and -off nozzles and lances and the trigger handle is comfortable and doesn’t vibrate in the hand. It cleans quickly and with power and the patio cleaner is far and away the best in our test, scrubbing clean neglected paving in one pass without spraying grime and filthy water everywhere. It's noisier than other patio cleaners as unlike those it doesn’t have bristles, but it’s worth it for the cleaning power. It's also by far the lightest washer we tested in this price bracket but this does make it feel less sturdy compared to the other, higher priced washers in our test.

What situations is the Karcher K3 Home pressure washer most suitable for?

The patio cleaner attachment makes this pressure washer the ideal choice for quickly blasting clean paths, patios and other surfaces in smaller gardens but the nozzles will also tackle bikes and cars as well as garden furniture and decking.

Is the Karcher K3 Home pressure washer good value for money?

With such impressive cleaning power this pressure washer is excellent value for money. A broad range of other accessories such as a Power Brush, Power Scrubber and Car and Bike Wash Brush are also available to buy and it comes with an extended three year warranty, when bought directly from Karcher.

Looking for some tips about cleaning your garden? Watch these video guides to find out the best way to clean decking, while Monty Don shows you how to clean a greenhouse.

Our experts have tested some great kit to give you a helping hand if you're tidying the garden, too. Our round up of the best pressure washers and best leaf blowers and leaf vacuums might be of use, and if you need a garden hose, check out our reviews of the best garden hoses and best garden hose spray guns. For the ultimate eco-friendly option, why not install a water butt to use with your portable pressure cleaner?


For more cordless garden tools, read our best hedge trimmers, best cordless mowers and best robotic mowers guides.

Product Specifications

NameKarcher K3 Home pressure washer
ModelK3 Home
Powered byElectric - corded
Maximum pressure120Bar
Water flow380
Hose reach6m
Detergent feedIntegrated detergent tank
Accessories included

Patio cleaner

Vario Power lance 

Dirt Blaster lance