[RMcNeal]

I second Jeff's sentiment, "There are no silly questions". Sometimes it seems the RV manufacturers, especially the "engineers", spend a lot of time and effort making these things more complicated than necessary. In the immortal words of Montgomery Scott, "the more plumbing they add, the easier it is to stop up the drain".
Even the most seasoned veterans get stumped sometimes. Don't be afraid or ashamed to ask. Everyone here started somewhere and had to learn along the way.