Wet and dry vacuums: Kärcher home or pro?

A wet and dry vacuum picks up what a household vacuum can’t: water, slurry, sawdust, plaster crumbs and general site mess. Kärcher makes two ranges. The yellow WD models are built for homes and garages. The grey NT models are built for work.

I use the grey ones on the job. For most builders cleans that means an M class model, and some construction sites ask for M class as a minimum.

Home or pro: the quick version

• Yellow WD (home): light, cheap to buy and cheap to run. Fine for a garage, a car, a spill or a weekend project.
• Grey NT (professional): heavier and dearer, but tougher. Longer hose and cable, metal tubes, and suction that holds as the bag fills.
• M class: what you need for concrete, brick and tile dust on a building site. Some sites will ask for it.

Three Kärcher wet and dry vacuums compared

Spec	WD 3 S (home)	NT 27/1 (pro)	NT 30/1 Tact Te M (pro)
Dust class	Not stated	L (filter certified)	M (99.9% tested filtration)
Container	19 L stainless steel	27 L plastic	30 L plastic
Rated power	1,000 W	1,380 W	1,380 W
Hose	2 m	2.5 m	4 m, antistatic
Power cable	4 m	7.5 m	7.5 m rubber
Suction tubes	2 × 0.5 m plastic	2 × 0.55 m chrome-plated steel	2 × 0.55 m stainless steel
Filter	Cartridge, plus a fleece bag	Washable cartridge, plus a paper bag	Flat filter with automatic cleaning (Tact), plus a fleece bag
Weight	5.0 kg	7.1 kg	14.2 kg
Colour	Yellow	Grey	Grey
Price seen	$229	$539	$1,398

Specs from Kärcher Australia’s pages for the WD 3 S, the NT 27/1 and the NT 30/1 Tact Te M. Prices seen at Australian shops on 11 November 2026, so shop around.

What I like about the grey pro machines

• The shape. The size, height and width are right for site work, and the wide base helps stop them falling over.
• Reach. The power cable and suction hose are a lot longer than on the basic models, so I can get up to heights without lifting the machine.
• Metal tubes. They’re far better quality than the plastic tubes on the cheaper models.
• Suction that lasts. They’re heavier than the cheap models, but they pull harder, and the suction stays up even when the bag is full.
• Easy to empty. The dust container is easy to get into.
• Storage. There’s a good spot on the back for the attachments.
• The look. We like the grey over the big bright yellow.

What I don’t like

• The floor head. The head that clips onto the tube isn’t the best. It falls apart easily and the bristles wear fast. The quick-release clips are good, though: you can replace the strips or swap the bristles for rubber strips when you’re picking up water.
• Falling over. When the machine tips over, which happens often on site, it tends to play up and needs switching off before it will run again.
• Brushes for tight spaces. Kärcher doesn’t make enough soft bristle brushes for drawers and tight spots. We use a generic brand that’s cheaper and does the job.
• Bags. Replacement bags for the pro machines are expensive, and you can’t use the universal bags that fit the cheaper Kärcher models.

Which one should you buy?

• Spills, the garage, the car, a bit of sawdust: a yellow WD is plenty, and the bags are cheap.
• A renovation at home: a pro machine copes far better with the amount of dust. For concrete, brick, tile or stone dust, go M class, and read the right vacuum for builders dust first.
• A cleaning or trade business: the grey pro range. Budget for genuine bags and a spare floor-tool strip or two.
• Building sites: M class at the least. Some sites ask for it, and Queensland’s silica code says to use H class for cleaning up settled dust where that’s practicable.

Whichever you buy, empty it before it’s full and look after the filter. Vacuum cleaner maintenance covers the routine.