new kitchen pipe slow draining

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by netmouse, Apr 18, 2014.

  1. netmouse

    netmouse Member

    Joined:
    Aug 7, 2012
    Location:
    NJ
    Here are photos of 1) new piping under the kitchen sink and 2) of the new opening in the sink.

    The opening really surprised me, as you can see there is only a small hole for water to drain. Is this normal? Could this be slowing draining from the sink?

    The disposer was removed because of very slow draining, and hope that removing the disposer would speed up draining. The contractor also snaked the piping to the basement sewer pipe. I'll be having a plumber visit next.
     

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  2. Smooky

    Smooky Member

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    Apr 4, 2011
    Location:
    NC
    You have an S-trap. You need a proper vent or AAV.
     
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
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    Retired Systems engineer for defense industry.
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    New England
    Not only is that an S-trap as already said, you cannot use that black rubber fitting inside of a house...those are only allowed underground where both ends of the pipe can be properly supported to keep them aligned. You need one with a metal band around it to meet code.

    Galvanized pipe can end up being VERY rough, and the rust crud can cause the interior area to be squeezed considerably. Unless you use a full-diameter cutting head on a snake, you could still have a lot of restriction in that pipe.
     
  5. netmouse

    netmouse Member

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    NJ
    I'm not a plumber. What is a proper vent or AAV? What does that entail? Why is an S-trap wrong?
     
  6. Kiton

    Kiton Member

    Joined:
    Feb 16, 2014
    Location:
    Quebec
    I am not a plumber, but that galvanized pipe looks rather old and jadnashua's point should be investigated.
    This in the insides of a 68 year old vertical section of a sink drain I cut out and replaced last week in my home.
     

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  7. netmouse

    netmouse Member

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    Aug 7, 2012
    Location:
    NJ
    Kiron, your pic shows one really bad pipe! Yes, I have a plumber probably here tomorrow to review what the contractor did.
     
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
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    Occupation:
    Retired Systems engineer for defense industry.
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    New England
    An S-trap can actually siphon itself. A vent, on a proper drain configuration, prevents that. The seal in the trap is what prevents sewer flies, gasses, and other nasty smells from wafting up into the house.
     
  9. SHR

    SHR Member

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    Journeyman Plumber
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    Minnesota
    Your "contractor" had no business touching plumbing. The picture of their work proves they have no idea how plumbing works. No one should be allowed to take money for such poor work. Get your money back from the "contractor".
     
    Last edited: Apr 18, 2014
  10. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    An "S" trap does not necessarily "cause" slow drainage, in fact the opposite is usually true, but in combination with a problem ELSEWHERE it will drain slowly. The "elsewhere" could be anywhere in the entire system and an AAV would NOT improve the drainage in that case. You need a competent plumber, and not all are competent, to see where the problem is and cure THAT, the address the "S" trap issue which is a different matter altogether.
     
  11. netmouse

    netmouse Member

    Joined:
    Aug 7, 2012
    Location:
    NJ
    Problem solved. The pipe was really snaked for a while this time. It was 15' of pipe to the sewer pipe. He said he could feel a small opening, then debris fell and completely closed it up. He kept snaking and then the drain popped open with good water flow.

    Thanks everyone for your input.
     
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