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Karcher K3 Home pressure washer review BBC Gardeners' World magazine

Karcher K3 Home pressure washer review

A simple but powerful patio and surface cleaner.

Our rating 
4.8 out of 5 star rating 4.8

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.
Set up/storage
4.0 out of 5 rating 4.0
Ease of use
5.0 out of 5 rating 5.0
5.0 out of 5 rating 5.0
Value for money
5.0 out of 5 rating 5.0
Pros: Powerful patio and surface cleaner

Comfortable to use

Integrated detergent feed

Good choice of sprays
Cons: Needs more assembly than many
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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


Brand Karcher
Name Karcher K3 Home pressure washer
Model K3 Home
Price £169.99


Powered by Electric - corded
Power 1,600W
Maximum pressure 120Bar
Water flow 380
Hose reach 6m
Detergent feed Integrated detergent tank
Weight 6.5kg
Warranty 3YEAR


Patio cleaner

Vario Power lance 

Dirt Blaster lance