Look under the RV in the area under the sink, water heater bathroom and near the fresh water tank. You should see two small tubes sticking down. Where you see the tube go inside the RV and look on the floor for two handles that you would pull upward.
Also look on the lower portion of the RV for any stickers that say Low Point Drain
2004 Jay Feather 25E
2001 Ford Expedition 4X4 EB 5.4 3.55 rear
2004 Ford Expedition 4X4 EB 5.4 3.73 rear