Bosch UniversalAquatak 135
Our verdict · Near-identical raw output to the K4 — a touch more pressure and flow on paper — for meaningfully less money, the value pick if you manage pressure yourself.
Buy it if
You want maximum grime-shifting power per pound and are happy to control pressure manually rather than pay more for the K4's water-cooled motor and Power Control.
Skip it if
You prize longest-term durability or foolproof surface protection, or want a bundled patio cleaner out of the box.
Where to get it
Bosch UniversalAquatak 135
~£109-135 (indicative, RRP £199.99)
Indicative price at the time of review.
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On paper the Bosch trades blows with our number one — Bosch's own specification quotes 135 bar and a 7.5 l/min flow rate (about 450 l/h) from a 1900W motor, so it edges the K4 on both pressure and flow — yet it frequently sells for around £109 to £135 against a £199.99 RRP, making it the standout value choice and the top mid-range pick in several 2026 UK roundups. It uses a 3-in-1 adjustable nozzle (high pressure, low pressure, detergent), a detergent nozzle and a roughly 6-7m hose, and weighs about 7.9kg. The trade-offs versus the K4 are real but specific: it lacks the K4's water-cooled motor and surface-specific Power Control, using a simpler variable nozzle instead, so protecting delicate surfaces is down to you. For a homeowner who won't run it to death, it is the most output for the money here. Treat the price as indicative — it swings heavily with promotions.
The good & the bad
Pros
- Slightly higher pressure and flow than the K4 on paper, for far less money
- 3-in-1 nozzle plus detergent nozzle covers most everyday jobs
- Frequently discounted well below its £199.99 RRP
Cons
- No surface-specific Power Control like the K4, so protecting delicate surfaces is down to you
- One of the heavier units here to move around at ~7.9kg
How it compares
| Pick | WATTB Score | Price | Best for |
|---|---|---|---|
| 1.Kärcher K4 Power Control | 88/100 | From ~£200 (indicative) | overall |
| 2.Bosch UniversalAquatak 135This pick | 84/100 | ~£109-135 (indicative, RRP £199.99) | value |
| 3.Nilfisk Core 140-8 PowerControl | 84/100 | From ~£190 (indicative; Core 140-6 £189.99, was £199.99) | heavy-duty patios and driveways |
| 4.Kärcher K2 (Power Control / Universal) | 74/100 | ~£90-119 (indicative, commonly ~£100) | budget and entry pick |
| 5.Worx Nitro HydroShot WG633E (20V) | 70/100 | ~£112 (indicative, bare tool: £111.99, was £139.99, at Screwfix) | cordless and portable |
Key facts
- Best for
- value
- Typical cost
- ~£109-135 (indicative, RRP £199.99)
- Max pressure
- 135 bar
- Flow rate
- 7.5 l/min (≈450 l/h)
- Motor
- 1900W
- Nozzle
- 3-in-1 adjustable + detergent
- Weight
- ~7.9kg
Researched by WATTB
- Published
- 19 September 2026
- Updated
- 19 September 2026
- Last verified
- 19 September 2026
- Sources
- 12 sources
We research and rank options from public data, official information and published reviews. How we research →
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