Quick answer
For sucking up water from a leak, an overflowing washing machine or a wet patio, a 12 to 20 litre wet and dry vacuum covers most homes, and the Kärcher WD 2 Plus is our pick: an Amazon's Choice rated 4.6 stars across 2,685 Amazon.co.uk ratings, with a 12 litre container, 180 AW suction and a blower function. For bigger spills, the Kärcher WD 3 holds 17 litres. For workshops and larger volumes of water, the Vacmaster Power 30 has a 30 litre stainless tank with a drain plug.
A household vacuum must never pick up water, but a wet and dry vacuum is built for it: the motor sits above a sealed container and a float cuts suction before water reaches it. That makes it the quickest way to lift water from a leaking appliance, a burst pipe or a flooded shower tray, and it doubles as a DIY dust extractor. These four were read on Amazon.co.uk on 15 October 2026, chosen for strong buyer ratings and container sizes that suit homes and workshops.
Our picks
Pick 1 · Best overall, Amazon's Choice
Kärcher WD 2 Plus Wet and Dry Vacuum, 12 L
Best for: Homes that need a vacuum for occasional leaks, spills and DIY mess.
Check price on Amazon.co.ukThe WD 2 Plus is the wet and dry vac most UK homes buy, and it is a good size for the jobs that actually happen: an overflowing washing machine, a leaking dishwasher, a blocked shower tray or plaster dust after hanging a shelf. Twelve litres means emptying several times on a large spill, so keep a bucket close. Remove the dry filter or use the wet filter setting described in the manual before vacuuming water.
Pros
- Compact enough to store in a cupboard
- Strong suction for its size
- Blower function for clearing debris
Cons
- 12 L fills quickly with a large leak
- Listing gives few details beyond suction and size
Key specs (from the listing)
- Container:
- 12 L
- Suction:
- 180 AW
- Extras:
- Blower function
- Use:
- Wet spills and fine or coarse dry dirt
Pick 2 · Bigger container, more suction
Kärcher WD 3 Wet and Dry Vacuum, 17 L
Best for: Bigger homes, garages and anyone who has dealt with a burst pipe before.
Check price on Amazon.co.ukStep up to the WD 3 if you have a basement, a garage or a utility room where water can pool. The 17 litre container cuts the number of trips to the drain, and 220 AW suction pulls water out of carpet edges and tile grout better. It shares accessories with the rest of the Kärcher WD range, so nozzles and filters are easy to find.
Pros
- More capacity for bigger spills
- Higher suction than the WD 2 Plus
- Same Kärcher accessory range
Cons
- Bulkier to store
- Listing gives few other specs
Key specs (from the listing)
- Container:
- 17 L
- Suction:
- 220 AW
- Use:
- Fine dust and coarse dirt, wet spills, hard floors
Pick 3 · Best for workshops and large volumes
Vacmaster Power 30 Wet and Dry Vacuum with Power Take Off, 30 L
Best for: Workshops, garages and homes that may need to clear larger volumes of water.
Check price on Amazon.co.ukThirty litres of water weighs 30 kg, so the drain plug on this Vacmaster matters more than it sounds: unscrew it over a drain instead of lifting the tank. The power take off socket starts the vac when a sander or saw starts, which makes it a proper workshop dust extractor. For a flat it is overkill, but for a house with a cellar or an older garage it is the most capable choice here.
Pros
- Largest tank on this page
- Drain plug empties water without lifting
- Power-tool socket switches the vac on with the tool
Cons
- Heavy and bulky for home storage
- More than most homes need for spills
Key specs (from the listing)
- Container:
- 30 L stainless steel
- Power take off:
- 240 V socket for power tools
- Drainage:
- Drain plug, no lifting
- Filters:
- Cartridge filter and dust bag
- Extras:
- Blower function, airflow control
Pick 4 · Best for DIY dust
Bosch AdvancedVac 20 Wet and Dry Vacuum
Best for: DIYers who want dust extraction first and water pickup second.
Check price on Amazon.co.ukBosch's AdvancedVac 20 is aimed at DIY users: plug in a drill or sander and the vac follows it on and off. The drain valve handles water from a spill or a leak. Paper bags make dry dust disposal cleaner, but remember to remove the bag before vacuuming water. It has fewer buyer ratings than the Kärchers, so choose it mainly if dust extraction is the main job.
Pros
- Automatic on/off with power tools
- Drain valve for water
- Complete accessory set
Cons
- Fewest buyer ratings of the four
- Filter bags are sold in sets of 5
Key specs (from the listing)
- Drainage:
- Drain valve for large volumes of water
- Power tool use:
- Switches on and off with the tool
- Extras:
- Blowing function
- Included:
- Paper filter bag, pre-filter, filter, nozzles, 2 extension tubes
Buying guide
What size container do you need?
Twelve litres handles most household spills, such as a leaking washing machine or a blocked sink overflow. Seventeen to twenty litres suits larger homes, garages and anyone with a cellar. Thirty litres or more is for workshops and properties where water can pool in volume. Remember that a full container is heavy, so a drain plug or valve is worth having on anything over 20 litres.
Using a wet and dry vac on water safely
Follow the manual for switching from dry to wet use: most need the paper bag removed and some need a different filter. Keep the vac and its plug out of standing water and use an RCD-protected socket. If water has reached sockets, electrical appliances or the consumer unit, switch off the power at the main switch before starting, and do not touch anything electrical while standing in water.
After the water is gone
Vacuuming lifts standing water, but carpets, underlay, skirting boards and plaster stay damp. Run a dehumidifier with the room closed, lift rugs to dry, and check walls and floors with a damp meter over the following days. Water that has gone under laminate or into a ceiling void will not dry by itself and may need the floor lifted or the ceiling opened.
Who should not rely on a wet and dry vac
A vacuum is not the tool for water that keeps rising, sewage, or anything more than a few centimetres deep across a room. Those need the water source stopped and, for large volumes, a submersible pump. Sewage backups carry bacteria that a household vacuum spreads; leave them to specialists. And for a quick spill on a kitchen floor, a mop is still faster than getting the vac out.
Questions people ask
Can you use a wet and dry vacuum for water?
Yes, that is what they are designed for. A float valve shuts off suction before water reaches the motor. Remove the dust bag and use the wet filter setting before vacuuming water.
What size wet and dry vacuum do I need?
A 12 litre model covers most household spills. Choose 17 to 20 litres for larger homes or garages, and 30 litres for workshops or properties where water can collect in volume.
Can a wet and dry vac be used as a normal vacuum?
Yes, for hard floors, garages, cars and DIY dust they work well. They are bulkier and noisier than a household vacuum, and most lack the brush heads that clean carpets properly.
Is Kärcher WD 2 or WD 3 better?
The WD 3 is better for bigger jobs, with a 17 litre container and 220 AW suction against the WD 2 Plus's 12 litres and 180 AW. The WD 2 Plus is smaller to store and enough for occasional household spills.
Can a wet and dry vacuum dry a carpet?
It lifts most of the water but will not dry a carpet fully. Vacuum in slow, overlapping passes, then run a dehumidifier and fans until a damp meter shows the carpet and underlay are dry.