Grey Water Useage

[Beatlejuice]

Hi I use grey water at home now with a simple system I designed. We keep all the bath and shower water. I have a auduino linked to several sensors and motors. The water is pumped and filtered into a huge container in a cupboard on my landing. I add chlorine and every time someone flushes the toilet the system pumps it to the toilets basin. If there is no water then it automatically reverts to mains. Why? You pay for fresh water and waste. We’re saving a fortune as our bathing water is ample for the days toilet usage. I’d be more than happy to share the design and code for anyone interested.