Our recently departed Ap who lasted less than five days could not get the hang of pulling the glass screen over the bath edge when she had a shower, despite being shown twice. Consequently she flooded the floor 4 times and used 2 whole (fat luxury) loo rolls, between Tueday am and Saturday am, mopping up the floor and flushing it down the loo to 'hide' it.
At the time I remarked to DH that we were lucky, given our ancient plumbing and pipework, to have not suffered a blockage with so much tissue going down in one go.
Spoke too soon.
One week after her departure I noticed the loo wasn't draining as fast, called a plumber (Bank Hol w/end) and he was due tomorrow as I (mistakenly) said, 'no emergency'.
Was water on bathroom floor by the loo pedastal this am, mopped it up thinking 'messy kids' but DD then went to the loo and flushed it.
I went downstairs to laudry and was struck by strong smell of poo as entered the room, switched on the light and there were cascades of water with feacal matter dripping from oak beam and down walls.
Ran back upstairs and floor was flooded with brown water, which had obviously come out from beneath pan/pedestal.
Emergency plummer arrived, yep joint under loo given way due to blockage in the down pipe and yes it could have taken over a week for it to show up.
The last AP buggered my immersion thermostat (by leaving it on for a few days and burning it out) and cold water tank had to be replaced (as the hot water expanded back up there and melted a hole) and cost best part of £1k.
And I've got to take DD and pals to Brownie camp later, which I will not be able to do if plumber not arrived - AAARRGHH