I recently had my toilet pipe relined as there was a crack where it enters the external wall. I'm in a bungalow so there is a gulley that the bath, washbasin and rainwater pipe go into and that pipe and the toilet pipe then go into the manhole. I was told the gulley didn't need checking with CCTV as there was no connection between the two pipes but when it rained yesterday I lifted the manhole and there was rainwater coming from both pipes. Can anyone explain why this is happening if there's no connection please and do I need to get the drainage engineer back to carry out further investigation? Thanks so much in advance.
