I manage a vacation home and got a call that the toilet was flooding. When I got there I found the toilet was clogged with too much paper (looked like they tried to flush 1/3 of a roll!). Anyway, the entire downstairs was flooded, but I don't understand how. If the toilet clogged shouldn't the overflow be limited to whatever water is held in the tank? The guest said they tried to flush the toilet 2 or 3 times, so I could see an overflow of 2 or 3 tanks fulls, but the entire downstairs was flooded and my shop vac picked up at least 50 gallons of water. After the clog was removed the toilet seems to be working properly, no stuck toilet lever, it fills normally and the flapper isn't leaking. So I just don't understand where the 50+ gallons of water came from if they only tried to flush 2 or 3 times.