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

It can, it’s called gray water recycling. You need a special plumbing system. You have to filter chunks out of the water, at least, and mix in clean water with dirty water, but it can be done.