"Bent" Pipe caused leaking
Update on my water leak issue: the dealer fixed a broken flange under the toilet, and thought that was it (although I was positive this was a freshwater leak, since there was no odor and only happened when water was under pressure). When I hooked up the next day - ugh, water again - seeping up through the floor and leaking outside the RV.
We took our Sunseeker 3120 DS Class C back up to Harold's this week, and they found a pipe in the wall behind the toilet that was "bent" instead of having a joint piece installed to accommodate for the way the pipes needed to go. The "bend" had eventually given way to leaking - and I'm wondering how long it's been going on. Doesn't sound like, thankfully, there is much lingering damage, but wanted to warn other folks that a shortcut like this could cause a leak in your freshwater system.
If they happened to have taken a picture, I'll post here later. Hoping to pick it up tomorrow!