Karcher Cartridge filter. The nano-layer cartridge filter is more durable than the standard one because the dirt can not penetrate deep into the pores of the filter surface. In combination with the automatic cleaning function, it is much easier to clean. It also ensures a higher level of dust retention. So the dirt remains where it is - in the sucker container. Of course, switching from wet to dry cleaning and back is done without changing the filter.
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