Ah, but we don't know that a pipe broke in this case, do we? We know only that the toilet overflowed, and you yourself stated that often a toilet overflow is due to a blockage caused by the user. And that blockage might be easily remedied, might it not? Yet you went on to claim that the landlord would be responsible for all damages that might occur in the unit, including apparently this overflow. My point was that you have to know what actual repair is required (and we don't know what was required here) and we have to know what the lease says, if anything, about who is responsible for that sort of repair. Without that information one cannot say who is responsible for the repair.