eli5 Is there a reason the waste water like from showers can’t be filtered through pipes and used for toilet water?

Question

eli5 Is there a reason the waste water like from showers can’t be filtered through pipes and used for toilet water?

In: 797

Answer 1

A similar idea is to use non-potable water (eg untreated well water) for all things in the house (showers, toilets, lawn, washing,etc) but have a potable water system only for drinking water (fresh drinking water tap at the sink, ice maker, pot filler, etc).