Connecting to black rubber mains pipe

Discussion in 'Plumbers' Talk' started by e5c3d4, May 25, 2023.

  1. e5c3d4

    e5c3d4 New Member

    The cold mains in to my house is a black flexible rubber looking pipe. Please see photo 1. It is currently connected to a 22mm stopcock.

    I’d like to send it 90 deg to the right so I can lower the shelf above it and have the mains come in at a more convenient place. See photo 2 (with annotations).

    What’s the best way to connect to this mains pipe? Any issues with this?


    Attached Files:

  2. BuildingMad

    BuildingMad Screwfix Select

    The black pipe is probably Alkathene & it is possible to make a connection to modern pipe, but you need to know if it is class C or D as they have different internal diameters. Markings on the outside of the pipe may give a clue. The pipe is flexible, but very stiff.
    If you have plenty of underfloor space for movement you could possibly get that pipe with the stopcock laying towards the right without any disconnection or insertion of another pipe, as the Alkathene fittings are large, so that just leaves work with the copper pipe side.
    Last edited: May 25, 2023
  3. e5c3d4

    e5c3d4 New Member

    That’s great. Thank you very much.
  4. The Happy Builder

    The Happy Builder Screwfix Select

    It probably not worth doing.
  5. Mike83

    Mike83 Screwfix Select

    Once the copper is disconnected the black pipe and valve may push down.
    You can then fit a 90 bend immediately after the valve and do whatever you like with the pipe.
    You can then fit a second valve (full bore) for isolation and leave the first one on.
  6. WillyEckerslike

    WillyEckerslike Screwfix Select

    If you can isolate the supply externally you can swap the valve for an elbow and then install the valve horizontally.

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