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Old 06-04-2017, 10:35 AM   #1
2016 GTS Sunseeker 2430S
Join Date: May 2016
Posts: 52
Sunseeker GTS 2430 bathroom sink question

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.

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Old 06-04-2017, 10:38 AM   #2
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Location: Southern Ontario
Posts: 5,931
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.


Ken and Terry
2018 Sunseeker 2430S-CD carried by a 2017 Ford E450
Former Georgetown 330TS owner for 10 years with more mods than I can count.
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Old 06-07-2017, 07:40 AM   #3
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Location: Central Oklahoma
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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 & Brenda
Thor Windsport 27K TST 507 Tire Monitors
2012 Jeep Liberty Limited Jet 4X4, Hopkins TOWD light wiring, Blue Ox baseplate W/Ready Brute Hercules tow bar and Ready brakes
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Old 06-07-2017, 09:26 AM   #4
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Posts: 660
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.
"If you are going through hell..keep going"
W. Churchill
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Old 06-07-2017, 08:07 PM   #5
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Location: New Jersey
Posts: 1,363
As others have said you see more and more, bathroom sinks especially, plumbed to the black tank.
2016 Forester GTS 2801QSF
2011 Jeep JK Toad
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Old 09-13-2017, 08:35 PM   #6
Join Date: May 2017
Location: Rogers AR
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That explains why our gray water monitor was on empty and the black kept rising! Kitchen and bathroom sinks plumbed to the black!
John and Judy Coker
2017 Sunseeker 2430S
2015 Jeep Wrangler Unlimited
Madison: Cocker Spaniel Queen of the Home
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bathroom, roo, sink, sunseeker

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