For a while now [Florian] has wanted to itemize his water usage at home to keep better track of where his water bill is coming from — and to help him develop water conscious habits. He’s not done yet, but has had a pretty good start.
The problem with measuring the water usage of everything in your house is that the plumbing involved to install sensors is a rather big job — so instead he assumed constant flow in some places and just used sensors on the valves to determine how long the valve was open for, which gives him a fairly accurate number for water usage.
On the right is his kitchen faucet which features a super quick arcade button hack to keep track of it being on or off.
The toilet was a bit trickier. He ended up designing a 3D printed mount attached to the lever on the inside of the tank — it’s pretty universal so he’s included the .STL files on his website if anyone wants to try implementing this system.
