You can use the Kärcher WD 4, WD 5, and WD 6 construction vacuums for various indoor and outdoor jobs. With the construction vacuum, you can vacuum coarse, fine, dry, and wet dirt such as wet leaves, water, or construction dust. This way, you can keep your house, garden, and workshop clean. Which Kärcher construction vacuum suits you best depends on the size of your job. With a Kärcher WD 4, you can collect 20L of dust or liquids and 25L with a Kärcher WD 5. You tackle the largest jobs with the Kärcher WD 6, with a 30L container.