My new-to-me Viking 1906st is awesome, but I can't seem to figure out how to drain the fresh water tank. This is something I do before leaving the campsite to reduce weight and plus I just think it's a good idea to keep the tank empty unless it's being used. The tank is under the dinette seat, and it is a manual pump for the sink. There's no spigot accessible from under the trailer (I looked) and no low-end outlet visible from inside the trailer. So ... I sure hope I don't have to manually pump it out at the sink. That would really suck (so to speak). Any suggestions/experience you'd like to share??