Sunseeker GTS 2430 bathroom sink question

[Gizmosmom]

Own a 2016 Sunseeker GTS 2430S. Does anyone know if the bathroom sink drains into the black tank? If so, how about the shower?

Accidentally left the water running in the sink and then the toilet almost overflowed.

We only use the bathroom sink to brush our teeth and wash our hands so never noticed before that the water might drain into the black tank.

Thanks!

[kenandterry]

If built correctly.....and that could be a big if....

Sinks and showers should empty in the gray tank(s) and only the toilet should empty into the black tank.

YMMV.

[FrankMor]

On a lot of RVs the bathroom sink is plumbed into the black tank. Our 89 Winnebago and our 15 Thor Windsport both were BR sink to black tank.

Frank

[Total Loss]

Our 2251 drains into the black. So does the kitchen sink. The gray tank is for the shower only.
This appears to be the design on units that have the passenger/curb side corner baths, along with the kitchen sink- same side.
The black tank is directly under the toilet. The kitchen sink would have too long of a run to the gray tank which is directly below (and slightly inward on mine) the shower drain.
I like it this way because you get more water into the black tank without running the toilet too much.
Better for dry camping IMO.

[sgtlm17]

As others have said you see more and more, bathroom sinks especially, plumbed to the black tank.

[Jrcoker]

That explains why our gray water monitor was on empty and the black kept rising! Kitchen and bathroom sinks plumbed to the black!