What is this drain line for?

Discussion in 'General Plumbing Help' started by Fusion916, Aug 6, 2013.

  1. Aug 6, 2013 #1

    Fusion916

    Fusion916

    Fusion916

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    I have a drain line that sticks straight up in the air and goes down into the basement on the side of the house and into the city drain/sewer.

    Anybody have a clue why this is there?

    IMG_1632.jpg

    IMG_1633.jpg
     
  2. Aug 6, 2013 #2

    johnjh2o

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    Looks like a vent to me.
     
  3. Aug 6, 2013 #3

    Fusion916

    Fusion916

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    Vent for the city sewer line? Does that make any sense?
     
  4. Aug 6, 2013 #4

    johnjh2o

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    It's hard to say without seeing where it's connected. I could be a vent for a house trap.
     
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  5. Aug 6, 2013 #5

    Fusion916

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    It's connected here to the picture I've previously posted:

    [​IMG]
     
  6. Aug 6, 2013 #6

    johnjh2o

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    There at one time was a fixture there and the line you're referring to was a vent for that fixture.
     
  7. Aug 6, 2013 #7

    Fusion916

    Fusion916

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    Sorry again I'm new to plumbing but I am confused

    If this was just a vent for some fixture that was apparently in the basement, why connect this to the city sewer at all? Why not directly outside?
     
  8. Aug 6, 2013 #8

    AQualityPlumber

    AQualityPlumber

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    I don't see a 2" vent connection that you took a picture of. You have a back water valve installed.
     
  9. Aug 7, 2013 #9

    Fusion916

    Fusion916

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    The pipe I am referring to is in the OP where it goes straight up along the house, the previous picture I posted was that same pipe going into the basement and is connected to the drain line. And yes, it's connected through the backwater valve, which I don't understand.
     
  10. Aug 7, 2013 #10

    johnjh2o

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    You have a capped line there that at one time connected to something that was vented with the line running up the outside of the building.
     
  11. Aug 7, 2013 #11

    Fusion916

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    Understood, but what I am confused about is why it was every connected to the drain line.

    Oh well, I'm going to remove that piping then.
     

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