Best Pressure Washer 2026: 10 Ranked, and Why 345 Bar Is Impossible

Run the arithmetic on this jet washer and it comes out exactly where a well engineered machine should. One hundred and thirty-five bar multiplied by 450 litres per hour, divided by 36, is 1,688 watts of hydraulic power from a 1,900 watt motor — 89% efficiency. That is close to the physical ceiling for a pump, and it means Bosch is quoting figures the machine can genuinely produce simultaneously rather than two unrelated maximums.

For a British patio that number is the one that matters. It is more cleaning power than the Kärcher K4 at number four, which costs £71 more, and it comes with a 7 metre high-pressure hose, a 3-in-1 nozzle that switches between fan and pencil jet by twisting, a detergent nozzle with a 450ml bottle and an inlet water filter that stops grit reaching the pump. The filter is the part people discover they needed after their first machine dies.

At 4.4 stars from 3,029 ratings it has the second deepest review history in this comparison. The one place the listing slips is the Tank volume field, which reads 410 Litres — a pressure washer has no tank, and that number is a mangled version of the flow rate. It is a data-entry error rather than a claim, but it is the same field that is wrong on six of the ten machines here.

Four thousand three hundred and eighty-three ratings at 4.5 stars is the deepest evidence on this page, and the Amazon Edition bundle is the reason to pick it over the model above. It ships with the 250 patio cleaner attachment, a wash brush, the high-pressure gun, lance, 5 metre hose and a variable fan jet nozzle. Buying the patio cleaner separately costs around £30, which effectively makes this the cheapest way into a Bosch.

The arithmetic holds up: 120 bar at 350 litres per hour is 1,167 hydraulic watts from a 1,500 watt motor, or 78% — the most conservative ratio in this comparison and a sign Bosch is quoting a pressure the pump sustains rather than a peak it touches. It is genuinely less machine than the UniversalAquatak, and that shows in the flow rate more than the pressure.

The listing does contradict itself on the headline number, though. The first bullet says the machine produces 100 bar; the specification table says 120 Bars; and the model is named EasyAquatak 120. Two of those three agree, so 120 is almost certainly right, but a listing that cannot state its own model number consistently is worth noticing. The Tank volume field, as with its sibling, contains 350 Litres — the flow rate in the wrong box.

Kärcher is the name most British households reach for, and the K3 Classic Home is the point in its range where the price stops being silly. It produces 120 bar at 380 litres per hour, which works out at 1,267 hydraulic watts, and it holds 4.6 stars across 829 ratings — the best rating with a credible sample anywhere on this page.

What you are paying the premium for is not power. At £134.76 it costs £36 more than the Bosch at number one while producing 25% less cleaning power. What you get instead is the ecosystem: Kärcher accessories are stocked in every garden centre and hardware shop in the country, the T-series patio heads fit without adapters, and replacement hoses and lances are trivially findable in five years when an unbranded machine has become landfill. It also weighs 4.15kg, the lightest corded washer here, and includes a water filter.

One small oddity worth pointing at, because it says something about how these listings are built: the specification field reads 1740.46 Pound per Square Inch. Nobody measures a pump to two decimal places. That is 120 bar run through an automatic unit converter, which is also why this listing publishes PSI while the Kärcher K4 two places below publishes Bars. Same brand, same marketplace, two different units in the same field.

If you are committed to Kärcher, this is where the money starts buying machine rather than badge. The K4 Power Control Flex delivers 130 bar at 420 litres per hour, which is 1,517 hydraulic watts, and Kärcher publishes a coverage figure of 30 square metres per hour — the sort of number that actually helps you decide whether a driveway is a morning or an afternoon.

Power Control is the feature that distinguishes it: the gun has a display and a dial that sets the pressure for the surface you are on, so you are not swapping nozzles between the car, the decking and the block paving. The Flex hose is genuinely more pliable than the standard one and 8 metres long, which on a British terrace is the difference between moving the machine twice and moving it four times.

Two honest caveats. At £169 it costs £71 more than the Bosch at number one while producing 10% less cleaning power, so this is a purchase about convenience and brand support rather than output. And at 15.5kg it is nearly four times the weight of the K3 above it, which matters if it lives up a step in a shed. The specification field here reads 130 Bars, in bar, unlike the K3 and K7 which both publish PSI.

Sixty-five pounds is the entry point to this category and VonHaus has 625 ratings at 4.5 stars, which is more evidence than four of the more expensive machines on this page. It is a 1,600 watt portable unit with a 5 metre hose that comes with accessories in the box, and for washing a car and hosing down a patio a few times a summer it will do the job.

The problem is that you cannot work out what it does. VonHaus publishes a flow rate of 6.5 litres per minute — which is 390 litres per hour, competitive with the Bosch machines — and then publishes no pressure figure anywhere on the listing. Without bar, the multiplication that tells you the cleaning power is impossible, and pressure is the half of the equation that separates lifting moss from rinsing dust.

The specification table also contains the clearest copy error in the comparison. The Tank volume field reads 6.5 Litres. The flow rate is 6.5 litres per minute. The same number has been pasted into a second field with a different unit, and a pressure washer does not have a 6.5 litre tank. It is also the only machine here quoting flow in litres per minute while the rest of the category uses litres per hour, so even the number it does publish takes converting before it can be compared.

A 20 volt battery cannot do what a 1,900 watt mains motor does, and WORX does not pretend otherwise. The Nitro publishes 56 bar and 220 litres per hour, which is 342 hydraulic watts — about a fifth of the Bosch at number one. Printing that number on a product page next to rivals claiming 345 bar takes a certain amount of nerve, and it is the strongest reason to trust everything else on the listing.

What the battery buys is not power, it is reach. This machine will clean a bike at a trailhead, rinse a dog in a field, wash a caravan on a pitch and clean garden furniture at the end of the garden without an extension lead crossing a lawn. It draws from a bucket or a water butt rather than needing a tap, which is the actual point of cordless. The brushless motor and IPX7 rating are the right engineering for a tool that will be used in the wet and stored damp.

At £131.75 it costs more than machines with five times the output, which is the cordless tax and is only worth paying if the cord is genuinely your problem. It weighs 4.11kg. If your patio has a socket within reach, buy any of the five machines above it instead; if it does not, this is the only entry on this page that can help you.

This is the top of the domestic Kärcher range and it produces 180 bar at 550 litres per hour, which is 2,750 hydraulic watts — 63% more cleaning power than anything else in this comparison. It covers 60 square metres an hour, has a 10 metre hose on an integrated reel, and weighs 18.8kg because a pump that does this has to be built like one.

Its real value to this article, though, is as a yardstick. Kärcher is a German engineering company with a reputation that took eighty years to build and could be damaged by one round of trading standards attention. It charges £459.99 and declares 180 bar. Two entries below, an unbranded machine charges £119.99 and declares 345 bar. If 345 bar were achievable from a domestic plug socket, Kärcher would be selling it, because Kärcher would rather have your £459.99 than not.

Whether you should buy it is a different question. For a domestic patio, 2,750 hydraulic watts is more than the surface needs and the extra pressure will strip the sand from block paving joints if you are careless. It makes sense for a large driveway, a farm yard or someone who cleans several vehicles a week. With 56 ratings, the sample is also thin for the money — though at this end of the market that reflects volume, not doubt.

On the numbers in the title this is a lot of machine for £83.95: 2,200 watts, 145 bar and 500 litres per hour, which multiplies out to 2,014 hydraulic watts — second only to the £459.99 Kärcher in this comparison. At 92% of the motor rating it is an optimistic ratio, but not an impossible one.

Then you open the specification table. The Maximum pressure field reads 145 Pound per Square Inch. The title says 145 Bar. These are not the same claim: 145 bar converts to 2,103 PSI, while 145 PSI converts to 10 bar. Somebody typed the bar figure into the PSI field, and the result is a listing that simultaneously claims a machine capable of stripping a driveway and one weaker than a garden hose with a thumb over it. The 14.5-fold gap is the largest single contradiction we found in this category, and it is on Amazon's own-brand product.

The rating deserves attention too. Four point zero from 32 ratings is the lowest average in this comparison, and while 32 is a thin sample, an own-brand product with Amazon's distribution should be gathering reviews faster than this. The Tank volume field, for the record, reads 300 Millilitres — that is the detergent bottle. Buy it for the motor if you are comfortable being an early adopter; do not buy it because the specification table told you anything.

The kit is the appeal here. For £84.98 you get an integrated hose reel, which is a feature the £169 Kärcher does not have, a foam cannon for washing a car properly rather than smearing it, and a 6-in-1 adjustable nozzle. At 4.4 stars from 138 ratings the early evidence is reasonable.

The listing simply cannot agree with itself on what the machine does. The title states 180 bar and 450 litres per hour. The specification table states 2103 Pound per Square Inch, which is 145 bar, and 420 litres per hour. Neither pair matches: the pressure is out by 35 bar and the flow by 30 litres per hour, and there is nothing on the page to indicate which set describes the object in the box. Using the lower, more conservative pair, the machine produces 1,692 hydraulic watts, which would put it level with the Bosch at number one.

It is also sold twice. A second listing carries an almost identical title, the same 138 ratings and the same 4.4 average, at £94.97 — the same product and the same review pool, ten pounds apart. We have linked the cheaper of the two. The Tank volume field, following the pattern of this entire category, reads 500 Millilitres and describes the detergent bottle.