A few nice Washing Machine Technology images I found:
Recycled Bathwater Washing Machine

Image by BAKOKO
This is our friend Mochi’s washing machine.
The Japanese have been recycling their bathwater for a long time. Since washing machines are usually located next to the bathroom, it’s simply a matter of syphoning water old bathwater from the tub into the washing machine. Japanese families share their bathwater, keeping it for several days and reheating it with a built-in boiler system.
Whereas this used to be a manual process involving a sperate pump, modern washing machines come with a special hose and filter attachment built-in.
The next step will be bath systems that have this feature plumbed-in, thus eliminating the hose and allowing the washing machine to be placed anywhere in the house.
Recycled Bathwater Washing Machine

Image by BAKOKO
This is our friend Mochi’s washing machine.
The Japanese have been recycling their bathwater for a long time. Since washing machines are usually located next to the bathroom, it’s simply a matter of syphoning water old bathwater from the tub into the washing machine. Japanese families share their bathwater, keeping it for several days and reheating it with a built-in boiler system.
Whereas this used to be a manual process involving a sperate pump, modern washing machines come with a special hose and filter attachment built-in.
The next step will be bath systems that have this feature plumbed-in, thus eliminating the hose and allowing the washing machine to be placed anywhere in the house.