Root cause

We've root-caused our bath tub!

It's the overflow drain.  Water rolls straight down our walls from the overflow drain.

AUGH!

Thanks some funky thing to see - water dripping out of your walls in the basement (which is like the ceiling in the basement - good thing there is no ceiling!)!  Yikes!  I hope you never have to see that, dear reader.  Freaked me out, I ran upstairs to bail water out of the tub and down the sink.

Well, this morning I cleaned the basement all up.  Dehumidifier is still on super low.  Fan is on moving air about.  Tonight or tomorrow we'll turn the furnace air back on, to really make sure the vent is dry before we plug it again.  I hope the walls dry on their own?  And I hope there is no puddle of water under the tub?  No water damange to dining room ceiling (yet).

And tonight Adrian will take a look-see and see if he can't connect it up to the drain?!  WHO DOESN'T CONNECT THEIR OVERFLOW VALVE TO A DRAIN?  Seriously!  Route it to flow down your WALLS?!?  Is that a much better idea?  No.

Really really hopeful we don't have to pull down the dining room ceiling to do this.  We may end up remodelling the bathroom instead!