Kärcher WD 4The Krcher WD 4 is an energy efficient, high suction powered vacuum cleaner that's designed for maximum performance. With a modern design and featuring an impact resistant 20 litre (5. 3 gallon) container and pleated filter in a filter box, the WD 4 is ideal for wet and dry vacuuming with no need for filter replacement. The new suction hose and newly designed clips floor nozzle feature two rubber and two brush strips to guarantee excellent cleaning