On Sun, 21 Dec 2014 15:29:47 -0500, Keith Nuttle wrote:

I would recheck the drain. From your test you have no idea of what
leaked around the seal, and what leaked into the basement.

The drain or the stall itself is about all that's left. Further
exploration is on my to-do list.


When you had the seal in place did it leak into the Basement?

No, but remember it was leaking under the seal/stopper and going into the
drain at about one quart an hour. Might even have evaporated on the way
down :-).