I have the Entegra Emblem 36T. After having the shower back up, and the sink in the master bath, I took it to the dealer. They were confused but finally figured it out. There are 2 grey AND 2 black water drains. The rear black water is the one on the left of the coach, it's large and easy to see.<br/>If you look behind the whit plastic panel where the hot and cold water...