Black Tank Fillin to Fast

dwurnitsch wrote:
Thank you all for you input.

The local RV shop said that it would be impossible for the bathroom sink to drain into the black. Thank you for confirming it does. But looking at the diagram of the system the bath sink does shows draining to the Grey Tank. Reading the holding tank alittle closer does confirm bath sink does drain into black. Diagram is wrong.

So maybe the hose water test into the kitchen sink to see if it went into the black tank actually didn't. We will need to retest during our next trip.

Washer we don't use but it drains directly to the main tank drain and not into a holding tank.


Again thank you for your comments.

Aren't you glad you came HERE and got the correct information vs relying on that local RV SHop??

I would think twice before having them do any repairs.

Bathroom sinks draining into black tank is not only common but has been done for many years