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Help with new bathroom soil pipe placment and layout

Discussion in 'Plumbing and Central Heating' started by samball2000, 11 Sep 2013.

  1. samball2000

    samball2000

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    Hi everyone,

    I wonder if I could pick some brains please, I've had an extension and added a 2nd bathroom upstairs, but the soil pipe and its route to the sewer has caused my builder a problem.

    Facing the back of the house, I want the pipe to run down the back from the back of the loo, down to the ground, turn 90' right, then along the bottom of the house, then another 90' turn and then along the side of the house and it will then hit the pipe that runs to the main waste pipes underground.

    Can anyone see an issue with this?

    He thinks he may have to run it through the house, either boxed in along the celing or buried through the floor in the bottom right and out to the pipes that way, but I am not keen on that idea, especially the boxed in pipe, don't fancy having a sh*t pipe above our heads.

    In the attached pic shows my prefered route (Black) and roughly how he would have it (blue), I assume all turns would be at least 90', nothing too sharp, so ignore the pic's tight turns.

    Your thoughts?

    Thanks in advance.

     
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  3. Nige F

    Nige F

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    The proper way is to have a stack pipe where your black line drops - picking up the WC and then going up to vent above the gutter - then into the ground with at least one manhole on the corner - underground to connect to the drain run where the existing stack is that`s out of sight . Kinda surprised that wasn`t put on @ the drawings stage , as it is covered by Build Control :confused:
     
  4. samball2000

    samball2000

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    Well, the idiot architect stuck a Saniflow in the corner of the room and had the pipe going through the walls and decided to arrange the bathroom how he wanted rather then ask me.

    The design has changed slightly to the original drawings, but my BC guy has always said, as long as it doesn't drastically deviate from the plans, he doesn't care.
     
  5. samball2000

    samball2000

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    MY concern is not what the Building Reg guys says, rather can it be set like that and not cause issues ie blockages etc, are the turns going to be ok?
     
  6. denso13

    denso13

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    Nige has explained how it should be done correctly.
     
  7. samball2000

    samball2000

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    Which is what I've drawn correct?

    Good.

    My builder was just concerned about the bends and drops.

    Thanks guys.
     
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  9. denso13

    denso13

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    Is it? Nige meant extending the existing underground drainage to the rear and putting in a new soil stack which would catch the new bathroom. Did you mean running the drainage around the building above ground?
     
  10. Hugh Jaleak

    Hugh Jaleak

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    Your builder should know how to run drainage correctly to comply with regs! External stack will be fine, needs to carry on up to above eaves level to vent though as Nige explained.

    Once underground you will need a long radius bend at the base of the stack, then run the drain along the back of the house to the corner. Provide an access chamber on the corner of the house to turn the drain 90 deg to run along the side to connect to existing. Avoid the macerator at all costs! Drainage work will be subject to Building Control Approval.
     
  11. samball2000

    samball2000

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    No of course not, it would run around underground and hit the existing pipe halfway up the side of the house, and I would add the inspection chamber there.
     
  12. Hugh Jaleak

    Hugh Jaleak

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    You need a chamber at a change of direction in the drain. A 90deg bend underground on a horizontal run is a big NO, and is asking for trouble.... :eek: Providing connection to existing drain is in a straight run then a chamber is not needed at that point.
     
  13. samball2000

    samball2000

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    If thats the worst I'm faced with then I'm happy, I can do that.

    Thanks guys.
     
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