[Pearlplayer59]

I have a new 2015 3440RL Montana. The owners manual leaves something to be desired. I found out that I have 2 gray tanks and one black tank. This is not in the owners manual. It just says I have a 96 gallon gray tank. I knew that the indicator panel had lights for 2 black tanks and two gray tanks. It was until the kitchen sink backed up that I found I had an extra EMPTY valve under my entertainment slideout near the kitchen sink. That is why the owner manual leaves something to be desired. Now I just don't know how big that tank is or how big the bathroom gray tanks actually are without filling the kitchen one with 5 gallon buckets of water until it backs up. Does anybody know this information before I subject myself to this task?
Thanks, Dave form Albany Oregon