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Thread: bathroom p trap wall pipe

  1. #1

    Default bathroom p trap wall pipe

    My house was built in early 70's..No plastic..I'm putting in a new sink and had to remove the wall pipe that goes into the wall..I needed a longer one.
    It seem where it goes in behind the wall into the plumbing there was some type of gasket as pieces of it fell out when I removed the pipe..I can tell with my finger that there is a ridge in there where a gasket could fit..
    What would I call it at Home Depot or should I just load it up with silicone?
    It is a 1 1/2 " waste pipe..

    Pic of what I am seeing is at http://home.comcast.net/~richandellen/DSC00843.JPG


    Dick.

  2. #2
    Plumber Plumber2000's Avatar
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    Dick, what you do is remove the entire threaded adapter out of that female thread , that what you see is screwed into a female tee, once you remove this adapter screw in a plastic male threaded adapter and install a a new trap from there, use ABS or PVC

    Last edited by Plumber2000; 02-17-2005 at 01:44 PM.
    Plumber for 20+years

  3. #3

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    First thank you very much..This is a very tight area for hack sawing..
    Are you saying to cut the part that looks like a 6 pointed nut?
    It looks like the female thread is part of the nut looking thing..so
    I'd cut from the inside..right?
    What would that plastic male adapter be called??
    Sorry I don't use plumbers language..
    I was also hoping to use the chrome waste pipe out of the wall..

    Dick.
    Last edited by eltorro; 02-17-2005 at 01:59 PM.

  4. #4
    Plumber Plumber2000's Avatar
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    See where the blue line I show, at the ends is as far as you need to cut to, once cuts are made the leaded adapter will be able to be removed from that female thread, then get a 1-1/2" Male adapter or even a 1-1/2" brass nipple at length you need it to be, Teflon tape the male thread, screw it into the female thread that you see after you have removed that old adapter out of there.

    Cut from inside to the outside only to where I show the blue ended lines..

    Then you can install your new trap, what ever type you want.
    Last edited by Plumber2000; 02-17-2005 at 02:06 PM.
    Plumber for 20+years

  5. #5

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    How is the new trap sealed to the new adapter?
    There are no threads on the chrome wall waste pipes I've seen..
    Dick.

  6. #6
    Plumber Plumber2000's Avatar
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    It is sealed with trap nuts with rubber or plastic washers,.
    Plumber for 20+years

  7. #7

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    It looks like the material is lead..inside the female threads..
    I can't use a propane torch?
    Please don't laugh...
    The plastic adapter will be behind the wall??
    Where can I send my check I really appreciate it..
    Dick.

  8. #8
    Plumber Plumber2000's Avatar
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    You can't use a torch, that adapter you see is what they used way back then, it screws into that female threaded 90 in the wall, you will get the picture once you get a small part of the adapter out of there, cut in several places so it comes out with ease, once out you use a new threaded nipple that will have threads on both ends, one end screws into that 90 and the other threaded end will accept the trap nut, that why I told you to get one to the length you need, they come in many lengths, from all thread/close up to 6" in length.
    Last edited by Plumber2000; 02-17-2005 at 02:28 PM.
    Plumber for 20+years

  9. #9

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    That threaded opening is really 1 1/2??
    Even thought the chrome trap is advertised as 1 1/2 it is quite a bit less..
    Dick.

  10. #10

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    I have no idea what length I need..hard to visualize when I haven't seen these respective parts put together..I just don't know how I can tighten nuts
    or whatever is used to seal the p trap to the adapter behind that wall with such a small opening.

  11. #11
    Plumber Plumber2000's Avatar
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    Go to a plumbing store, look at the threaded 1-1/2" nipples, there will be a length you will need to get that will extend out the wall, it need to extend a min of 3/4" to 1" you have to be the judge. It can extend as far as you like, it's your choice, and depends on position of the trap connection.

    But before you do this you have to remove that old adapter out of there, there is no other way.

    Traps are just undersized out of the package, that is why washers are used the seal the trap to the pipe stub out.
    Plumber for 20+years

  12. #12

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    Thanks again..There was a nice shinny crome pipe that went into the wall and there is was chrome cover that goes covers the wall hole.
    This is what I am stuck on..if the adaper is out 3/4" it can't work that way..
    Is there someplace on the net you know of..don't go looking..I can..that will have a drawing or picture of what we have discussed?
    Maybe when you said extend you didn't mean beyond the living space wall??
    The old adapter is about 1 3/4 inches from the finished wall..
    Sorry for being thick as a brick..



    Dick.

  13. #13

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    I think I have it..the trap nut with some rubber washer screws on the end of the nipple..Then you slide the waste pipe into it..
    Dick.

  14. #14
    Plumber Plumber2000's Avatar
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    They make what is called Escheons

    This will cover the pipe and nut out the wall, will give you the finished look.
    Plumber for 20+years

  15. #15

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    Well thanks it worked as you said..
    I was hoping I could tell when I cut too far but the part screwing into the female portion is also brass.. thought I could uses the filings as a tip off to stop cutting..Took out a small section and was able to use my screwdriver to unscrew it..
    Had some washer problems with adapting 1 1/4 to 1 1/2..the pop up sink drain
    for some reason is reduced to 1 1/4..
    Thanks again..

    Dick.

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