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Here is a recent installation done to my home

p trap

I took this one before i drained the water: p trap submerged in water

Note that this a p-trap that is installed at the external wall of my house. It would be in line with the p-trap of the kitchen sink, which very close at the other side of the wall.

My questions are:

  • Is this a mistake?
  • If so, what damage it can do?
  • what is the correct part that needs to be installed?

update: I have rebuild it myself. here is the result, what do you think? enter image description here

update 2 posted a folow up question: what is the correct procedure to patch up cinder block hole with plumbing?

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    Are you sure it is a ptrap ? I can not see in the hole, How does it connect to drain down ? . the sanitary tee is upside down. Why was this work done ? More info is needed.
    – Alaska Man
    Commented May 15, 2020 at 16:59
  • it is yes a p-trap. its diffecult to see the bottom half because it is submurhed from a leak
    – yigal
    Commented May 15, 2020 at 17:07
  • @AlaskaMan, I have just drained some of the water and took more photos
    – yigal
    Commented May 15, 2020 at 17:20
  • That can not possibly be a drain from a sink inside on the other side of the wall as it does not drain down. Have you asked the plumber or person who installed it ? It makes no sense with the info you have given us. It may be a drain for some thing above but again the santee is upside down. What fixtures might above that the vertical pipe would be coming from ?
    – Alaska Man
    Commented May 15, 2020 at 17:28
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    That’s not the right place for a trap to be except for a bathtub. It looks intentional to me so not a mistake, someone probably had plugged drain issues and this was their way of fixing it. Definitely a diy not correct with the T in backwards and not a good place as it will probably freeze if you have freezing conditions in your area.
    – Ed Beal
    Commented May 15, 2020 at 18:27

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