New owner.

[bishgeo]

Valves in docking station are labeled gray 1 gray 2 and waste. I’m used to black water grey water and galley. What is shower grey and what is galley drain. 😳

 

[danemayer]

Typically, Gray 1 is the shower, bathroom sink, and washing machine. Gray 2 is the galley.

Run the water in the bathroom sink and see which valve lets it come out the drain.