I just finished a thourough cleaning session of my hot hub, which I am using for just over a year and was passed on to me by the previous owner of this house. I noticed this yellowish border inside the filter housing, mostly on the top of where the filters sit. I tried removing it with an abrasive pad but that hardly gives any result.
Is this some kind of really sticky biofilm? I figure it could also be some kind of pipe glue which has yellowed a bit over the years. Will happily provide more details if needed. Pictures included in attachments.
Is this some kind of really sticky biofilm? I figure it could also be some kind of pipe glue which has yellowed a bit over the years. Will happily provide more details if needed. Pictures included in attachments.