Just an idea I was thinking of for my house, since I have my tank backed up against a shared wall with a bathroom.
This would syphon off water from the tank for the toilet tank and refill it with a toilet float valve in the tank with fresh water from the now un-used toilet water supply.
I could see moving 10 plus gallons of water a day thru this system a day with zero wastage.

This would syphon off water from the tank for the toilet tank and refill it with a toilet float valve in the tank with fresh water from the now un-used toilet water supply.
I could see moving 10 plus gallons of water a day thru this system a day with zero wastage.

