Have just had my kitchen floor screeded and unfortunately the young apprentice that was helping poured all the excess screed down the drain. Of course he didn't tell anybody and it was 48 hours later that literally the **** hit the fan. The flooring company immediately got a national drain clearing company and it took them a couple of hours to break through with hammer and chisel and apparently clear all the cement latex away. The house is victorian and the drains are original i.e., earthenware type. Everything seems ok at the moment but I am concerned that a) the blockage might be only partly cleared or b) that hammer and chisel might have cracked the drain. The flooring company is reputable and is not going to disappear overnight. I have told them my concerns and they have said any reasonable problems occuring over the next few months come back to them. I am not happy with this because I don't know what problems might be ahead or am I just being paranoid? How can I get the integrity of the drain checked? Thanks.