Help with understanding sewer diagram

Discussion in 'Where to Buy' started by Sady.Sydney, 20th Jun, 2020.

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  1. Sady.Sydney

    Sady.Sydney Well-Known Member

    Joined:
    22nd Jun, 2018
    Posts:
    79
    Location:
    New South Wales
    Looking to buy this house and plan to build a granny flat in future. Below is the sewer diagram. The solicitor is saying that sewer main only run on edges of the lot and it meets property's sewer via diagonally laid pipe in the rear lawn.

    Am I able to build granny flat in rear lawn on top of diagonally run sewer without any issues?

    Is solicitor interpretation of sewer is correct?



    IMG_20200620_181439.jpg
     
  2. Mark F

    Mark F Well-Known Member

    Joined:
    29th Jan, 2020
    Posts:
    1,029
    Location:
    Canberra
    It looks correct. The connection to the main sewer is the black square. A branch line in yellow runs to the property connector point (the circle with the cross) and is made of 6" (150mm) vitreous clay pipes (VCP) which suggest it is an old house. This raises the issue of the makeup of the line from the house to the connector - most probably clay pipes and they are down 1.8 metres at the connector. It is likely that you will need to replace the line from the house to the connector with upvc and possibly embed it in concrete in order to build over it. Not a huge problem but if doing it you should consider replacing the line right to the house, not just under the building envelope, and doing any serious plumbing changes you would like to do in the main house at the same time.
     
    wylie likes this.

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