This is a pre/sediment/dirt cartridge.
It is used prior to your carbon or fine filtration medium.
This cartridge is used to collect dirt, sediment, rust, silt. It does not stop bacteria or cysts and does not remove chemicals.
Pleated to provide more surface area for dirt loading. Can be semi-cleaned. Hose down gently to remove surface dirt.
Please note: This cartridge is for 'domestic style' systems that fit 9 & 3/4" sized replacement cartridge. Does not fit the B.E.S.T. Inline models.