National Dolphin Dumping Question
Hello, We just purchased a 2002 National Dolphin and can't be sure which valve is for black water and which is grey water. Can anyone help me solve the mystery? Thanks so much! Richard ...
Forum Discussion
Also simply look at the wherebouts of the toilet on the outside of the coach. Follow the plumbing to a huge container. That is the black tank. Follow the pipe out from that to the valve.
