Water, rubble, workshop · review
The first WD with a socket for a power tool — which is what turns a vacuum into a dust extractor.
The bottom line Buy it for the socket, not the extra three litres. Everything else here is the same machine as the WD 3.
The WD 4 P adds three litres to the WD 3 and one thing that matters much more: an appliance socket on the machine.
A vacuum with a power take-off stops being a cleaning machine and becomes dust extraction. The tool plugs into the vacuum, the vacuum senses the trigger, and dust is captured where it is made rather than swept up afterwards. For anyone sanding indoors, that is the difference between a job and a fortnight of fine dust on every surface in the house.
Five metres of cable and 2.2 metres of hose give about seven metres of working radius. It is not generous — the WD 6 P S offers eight metres of cable and 3.5 of hose — but it is enough to work across a garage without dragging the machine after you every two minutes.
This is an L-class machine. That covers sawdust, general workshop debris and household mess. It does not cover plaster, concrete or MDF dust, which need M-class filtration; the difference is not bureaucratic, it is what stays airborne in the room afterwards.
One reference across all six Amazon stores. Prices differ sharply between markets on this model — the live price on the page is the one to trust.
| Container | 20 l, plastic |
|---|---|
| Cable | 5 m |
| Hose | 2.2 m |
| Power take-off | Yes — appliance socket for a power tool |
| Floor nozzle | Clip-on, with Pull & Push parking |
| Part number | 1.628-270.0 |
| Amazon reference | B0CRVVJ7L9 |
| EAN | 4066529027894 |
The tool plugs into the vacuum instead of the wall. Pull the trigger on the sander and the vacuum starts with it; release, and it runs on for a second to clear the hose. That single feature is what makes sanding indoors tolerable, and it is the reason to choose a P model over the plain one.
Not safely as sold. Fine mineral dust needs at least M-class filtration; an L-class cartridge passes a proportion of it straight through the motor and back into the room. For occasional light sanding, a fleece bag plus the cartridge helps — for a genuine plasterboard job, hire or buy an M-class extractor.
Compared with the median of its own aisle on this site — not with the market at large.
7.8/ 10
Buy it for the socket, not the extra three litres. Everything else here is the same machine as the WD 3.
A workshop where a sander, a router or a mitre saw is used indoors
cleaning machines from the same category, at nearby prices. Only what all of them publish is shown: a column with holes compares nothing.
| Model | Price | Container | Amazon reference |
|---|---|---|---|
| Kärcher WD 4 P V-20/5/22 | 125 € | 20 l, plastic | B0CRVVJ7L9 |
| Kärcher WD 3 V-17/4/20 | 110 € | 17 l, plastic | B0GC6MPDLY |
| Bosch UniversalVac 15 | 91 € | 15 l | B06XT2BCCH |
| Vacmaster VQ1530SFDC | 88 € | 30 l, stainless steel | B08C34L9X2 |
At 125 €, it sits -24 % against the 165 € median of the 13 models in this category published here.
Listed because the accessory itself names this model as compatible.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 15, 2026.
Specifications: the manufacturer sheet for cleaning machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
1 250 W · 65 l/s airflow · 200 mbar · HEPA filter
The only machine here that publishes both numbers that matter — airflow and suction.
Best for: Trade use, or a home workshop where the vacuum runs alongside tools most weeks
≈ 170 €
1 000 W · 15 l · five paper bags included
The small, cheap, sensible one — and the bags in the box are most of the value.
Best for: A flat, a car and light workshop use, where storage space decides more than capacity
≈ 91 €
L class · HEPA filter · button filter cleaning · 2 000 W tool socket
Einhell's site-grade answer: dust class L with a HEPA element and a socket rated for a real power tool.
Best for: Site and workshop use where the vacuum runs off a saw, and where L-class filtration with a HEPA element is the requirement
≈ 195 €
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
