Those with two black tanks

[travelin texans]

Originally Posted by NapaTravelers

I have 2 black tanks but only 1 toilet. What would the second one be for?

2012 Raptor 300mp

Then you only have 1 black tank.
Here's a misnomer for you; if nothing brown goes into the tank it's not a black tank!
Either the panel is as Marshall stated a universal panel or mismarked & should be another grey tank.

[NapaTravelers]

Ok that’s what I had assumed but glad to have confirmed. Having the second grey tank through me for a loop.