we found a device under the unit next to the main dark and gray drain. it's a rod with a hand that comes out of the bottom of the trailee near the side of the gray water pipe.
The unit is covered under neath so we can't see what the rod is attached to. You can pull it and Push, and feels like it opens and closes something. If anyone has the same trailer and knows what this is, Would appreciate knowing
Thanks very much for the information, so there would be 3 gray water tanks, because there is a separate gray drain across from the kitchen sink in the island. Sorry for all the questions, its disappointing that our dealer doenst have any answers for us.
I have a 2017 model of the sister trailer to yours; the Salem Hemisphere 272RL.
On mine, the front-most gray tank connection is for the outdoor kitchen.
The other two gray tank connections are for the kitchen sink, and for the bathroom. So there are 3 separate gray tank discharges.
Forgot to mention; at the back sewer connection where the two gray tank discharge lines empty into the main sewer line, the black tank release is kind of far back behind the gray tank release on the left.