I need to put in a new soak away as I don't know where the old one is and the gully between my house and patio fills up quickly, it does drain but slowly. The problem I have is the main sewer runs along my back garden, isn't very deep and runs about 1.5 - 2.0 metres from the house wall. I'm worried about disturbing the sewer and I'm convinced the sewer pipe is the same height as where I need to lay a soakaway pipe. I'm conscious of the fact that a soak away should be 5 metres from the house wall. I know I can't discharge it into the sewer too. Does anyone have any advice for me please?