Just got a question back from my buyers requesting a copy of the S104 document. I had to google what this was about - it refers to the adoption of the sewage pipes by the water authority once a development has been completed. Mine is a 1970's build house so would have been connected to the main network 50+ years ago. There was an extension to the house in 1998 - where all the additional plumbing connects to the existing sewage pipe. I don't understand why this question has been raised - anyone else has this issue?