Got the house dewinterized. Worst 75 I've spent in a long time. All they did was take the tape off the damn sinks/toilets and flushed the toilets a few times to get the antifreeze out of them.
When he flushed the upstairs, the main sewer pipe started leaking. So now I have an idea of what is going on with it. There's a leak somewhere between the floors that only affects the drainage from upstairs.
blah...
Good thing my dad used to be a plumber, eh?
I have a second job interview today, so after that we'll be wandering around trying to find out where the leak originates at.
Might take off the plaster board in the hallway then drywall it later.