Originally Posted by KarenS144
I KNOW the sensors are off but it's never shown full before. The kitchen sink drains into the grey but I was under the assumption that everything not toilet drained into the grey.
Use to be black was only toilet but now often the bath sink goes to black. We just bought a 2015 Thor and that is how it works. All my other rvs were separate. Best way to check is once you have dumped leave the valve to the black open and run each sink and shower individually to see if water comes out of the black tank. If no water drains then it is toilet only.
Shame they can't come up with an accurate sensor because it is a real pain in the butt not really knowing what capacity the tank is holding