Is there a plumbing enthusiast that can reassure me? In middle of renovation of property to install bathroom to front of property. Had it checked by builder who assure us drain ran to front of property therefore soil pipe would drain fine towards front of property. Turns out that somehow, despite our neighbour draining to front, ours drains to the back. Therefore he is investigating whether a soil pipe can run diagonally to join existing drain. He is unsure of 'the fall.' I think I might scream. We have actual plumber coming to look on Saturday but I'm very stressed and looking for distraction!