All, I have done searching but have not found the exact response I am looking for.

I recently bought a 2016 328M. The online documentation says I have one grey tank. There is one pull valve on the Nautilus system in the pass through. However, on the level readout in the RV the second grey tank was reading full (4 lights). Also, the kitchen sink would barely drain. I am guessing there is a second pull valve somewhere but I haven't found it. Does anyone have a picture of the location of your second pull valve? I have emailed Grand Design with my VIN number to see if they will respond. However, about to head out for another trip and really don't want to end up in an overflow situation.

Thanks

Also, there is a second black tank readout in the RV. I am assuming that these readouts are generic and GD saves money by having one panel for all of the RVs.