Welcome to Spring finally. I de-winterized everything BUT my hot water heater. I'm doing that for my first time on Sunday. I know on the outside I take cover off and turn the three valves opposite of what they are now. I also think there is someting to do under my mattress up front where I have to take screws out. I have a 2010 189FDS . Can someone please help me with this..my goal is not to mess up my hot water heater on my first try. Thank you very much and happy camping to all.