Entered into this year’s Hackaday Prize, [TVMiller] built a super cheap Arduino powered gray water recovery system.
The system is very simple and can be easily made for almost any bathroom. By making a zig-zag of PVC pipe underneath the sink, he’s created a simple grey water reservoir sized for his toilet’s flushing capability. And if you use too much water, it just backs into the drain — think of it as a giant P-Trap! A 12V solenoid and 240L/h water pump switch on after the toilet has been flushed — refilling the tank with reused gray water! He’s also added an Arduino and an LCD screen to keep track of the water saved; with the nice touch of a HaD logo of course.
We love [TVMiller’s] project brief build logs — he doesn’t hold anything back.
Pipes were glued, the inhaled toxins coursing through my lungs and penetrating the cells, turning me in an enhanced human, now capable of lifting small things with great ease, like a stapler or Big Gulp.
And if you wanna skip a step altogether — why not combine your toilet and sink into one? No electronics necessary!