Kärcher NT 25/1 Ap Bedienungsanleitung Seite 14

ATTENTION
The flat pleated filter must always be in
place while vacuuming.
ATTENTION
Please note the following when switch-
ing from wet to dry vacuum cleaning:
If you vacuum dry dust while the filter ele-
ment is still wet the filter will become ob-
structed and may be damaged beyond re-
pair.