By the filter code printed on the element or in the manual, not by the machine’s family name — ranges have used several filters over the years.
Kärcher’s WD range is the clearest example: the same family name has taken different bags and different pleated elements across generations.
Take the old element out and read it. If it is unreadable, the manual lists the part number, and the machine’s rating plate gives the exact model needed to look it up.
Third-party equivalents usually list the codes they replace — that list is the thing to check, not the photograph.
Last reviewed 2026-08-15