Mar 11, 2019 - 02:36 AM
Thank you for contacting Biobidet Support.
The filter in every bidet is meant to last the lifetime of the bidet. You should never have to replace the filter. The filters are available for purchase only in the even you notice an unpleasant smell emitting from the filter. Take the filter out for a week and notice if the smell goes away. If the smell goes away, you will need to replace the filter.
Source: Bidet Filter