The Dyson 919171-02 DC25 Prefilter assembly is located at the top of the canister, just below the handle and is a spare or replacement prefilter that should be washed at least once every 3 months. The filter should be completely dried before it's returned to the vacuum.
This filter is suitable the following upright vacuums:
- DC25 All Floors Exclusive
- DC25 Animal
- DC25 Blue Exclusive
- DC25 Blueprint Limited Edition
- DC25 Mail Order Exclusive
- DC25 Multi Floor