Originally Posted by GUS2000
In the wet bay, you will see a small panel above the two switches (black/grey dump valve switches). remove that panel and you should have access to manually pull the grey tank valve.
We had the same same problem when we took delivery of our SS4061.
The T valve behind the panel in the wet bay that Gus2000 refers to is for the Black Tank only.
After finding someone at new star familiar with th Super C we located the grey tank T Valve.
First open the passenger side pass through and pull out the drawer to get it out of your way, then Open the opposite side (next to last) cargo door on drivers side (pass through compartment) . You will have to crawl in the bay and look up in between the frame rails and you will see the T Valve and you can operate it manually then.
On ours the clip holding the electric actuator onto the T valve had come loose
After replacing the clip back in place I secured it with a coupl of zip ties and have not had any problems since.