Sanitaire SC420 Backpack Va...
$55.99
Product details
The reusable cloth bag for the Sanitaire SC420 backpack, part C3521500, which also fits the Powr-Flite PF100BP.
A cloth bag earns its keep by being emptied rather than thrown away, but the fabric does not last forever. It thins where it flexes, works pinholes open along the seams, and eventually stops holding fine dust, which then goes straight out through the weave and into the room you were cleaning. Airflow suffers at the same time, because a bag clogged deep in the fabric cannot be shaken clean.
The test is simple: hold it up to the light. If you can see through the fabric, or the seams have started to open, it has done its work. A fresh bag restores both the dust collection and the suction that a tired one was quietly costing you.

