Kärcher - High Pressure Washer K 3 Horizontal

A pressure washer earns its keep the moment you realise a garden hose and a scrubbing brush simply cannot shift a winter's worth of green algae from patio slabs — and that is precisely the problem the Kärcher K 3 is built to solve. Running at 120 bar of pressure, it delivers enough force to blast moss, mud and grime from concrete, brick and garden furniture without requiring the kind of machine that takes up half a shed. The four-metre high-pressure hose gives you genuine reach around a standard patio or driveway without constantly repositioning the unit, and the horizontal design keeps it stable and compact when stored.

Who Is This For?

This machine is well-suited to homeowners with a small-to-medium patio, a set of garden furniture that sees seasonal neglect, or a car that needs an occasional proper rinse. If your pressure washing needs are genuinely occasional — a few sessions per year rather than weekly commercial-grade work — the K 3 sits at a sensible level of capability without over-speccing. If you have a large driveway, render that needs regular cleaning, or a two-storey property with gutters to reach, you should be looking at the K 5 or above.

What Buyers Say

Owners consistently praise how quickly the K 3 gets going — minimal assembly, straightforward connections, and noticeable cleaning power from the first use. The Dirt Blaster lance attachment draws particularly positive mentions for stubborn staining on block paving. The most repeated limitation is the relatively short power cable, which can create awkward routing on larger jobs, and some owners note the hose connections feel less premium than the machine itself.

The Deal

The K 3 is currently £99.99, down from £119.99 — a £20 saving. However, our price history shows this product has never actually sold above £99.99 since we began tracking it, which means the "was" price warrants some scepticism. For context on how this compares to the wider market, our best pressure washer deals guide covers the current landscape honestly. At £99.99 it is a fair price for a Kärcher entry-level machine, but do not let the percentage saving be the reason you buy it.