Hi everyone, I just bought my first fifth wheel camper a 2012 sandpiper 32qbbs. Previous owner gave us all the manuals that came with it but not very helpful at all. The closest forest river dealer is 1 1/2 hours away so I can't just hop in truck and go talk to salesman about how things work. I have have rocker switch at main panel that says blk1 and blk2 with arrow going down to test button you push in to check level. tank 1 shows full 2 shows empty I only have 1 lever on outside to drain black water tank and 2 to drain grey water tanks. Am I missing something (is there actually 2 black water tanks) or is sensor bad showing how much is in the tank? also is there any way to make draining fresh water tank simpler than crawling under camper and unscrewing a cap (if I am doing it right). Thanks for any info anyone can give me!