I like the theory of the sink flowing into the black to increase solid/liquid ratio but also think Thor just wants to confuse us.
The front bathroom does just that, but the rear bathroom does not. Sink goes to grey and toilet to black. Not very consistent in the approach.
My problem is normal campsite hookups. I leave the grey open but close the black. This is a normal process and let's you run your black for a week before dumping. Also lets the enzyme type treatments chew up that solid stuff before dumping. But now I have to dump the front more often and use a lot more tank enzymes.
In my old Jamboree, sinks went to grey and toilets went to black. You always flushed for a few seconds to get water in.
Also, drink more water, naturally you should let out more liquids than solids.
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