My THINGY is leaking!

Discussion in 'Plumbing Forum' started by Packy, Feb 20, 2010.

  1. Feb 20, 2010 #1

    Packy

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    It really ticks me off when my wife, who doesn't know beans about anything, calls everything a THINGY. She told me today that the thingy under the sink was leaking. I checked the "thingy" out and saw that there actually was a leak where a white pipe joined a black pipe. The white pipe was sticking out the the sink and was about the length of a ruler with 2 or 3 inches missing. The water was coming out at the top of the black nut where the two pipes came together. My neighbor, who graduated from high-school, told me that the trouble was that my black pipe shouldn't have been doing business with my white pipe. As far as I know, he isn't prejudiced or anything like that — do you think he might have a point?
     
  2. Feb 20, 2010 #2

    travelover

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    Yes, right on top of his head. :D
     
  3. Feb 20, 2010 #3

    Nestor_Kelebay

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    The fastest easiest fix would be to put a pot on the floor under the thingy.
     
  4. Feb 20, 2010 #4

    Wuzzat?

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    [ame=http://www.google.com/search?client=safari&rls=en&q=define:+%22common+noun%22&ie=UTF-8&oe=UTF-8]define: "common noun" - Google Search[/ame]

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    Carrying the unborn is the ultimate important job, and that responsibility goes to . . .?

    Women interested in cylinder-shaped thingies that leak? Where are you going with this. . .?
     
    Last edited: Feb 20, 2010
  5. Feb 20, 2010 #5

    Bud Cline

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    Many years ago when I was much younger, my "thingy" also had a leak and penicillin took care it.:)
     
  6. Feb 20, 2010 #6

    Packy

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    Having done some homework, I've discoved that black is ABS pipe and white is PVC pipe — it is true they shouldn't be used together. For one thing they sre of different ODs and can only be joined by a very odd looking contrivance that ties them together butt to butt. I'm resolved to either dump the white tailpiece and covert to black or get rid of the black and convert to PVC for a perfect all white slip joint which will produce a leakless thingy.
     
  7. Feb 21, 2010 #7

    Redwood

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    But if your black and white thingys are tubular joined with slip joint connections they are neither ABS or, PVC, they would be polypropylene which comes in black and white...

    Why don't you take a picture of your leaking thingy and post it...
     
  8. Feb 21, 2010 #8

    oldognewtrick

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    uhhhh, Bud, he's talking to Packy....I hope....

    You are, arn't ya Redwood???
     
  9. Feb 21, 2010 #9

    Nestor_Kelebay

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    Packy: Does your sink drain look similar to this:

    [​IMG]

    and is the water leaking out at the top of the trap adapter (where the tail piece from the sink enters the trap adapter)?
     
    Last edited: Feb 21, 2010
  10. Feb 21, 2010 #10

    Redwood

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    I would imagine I was...:rolleyes:
     
  11. Feb 21, 2010 #11

    Packy

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    Nestor,

    I was stunned when I saw your diagram, it's exactly what you'd see if you looked under my sink. The tail piece is white (PVC I think), and everything beyond that is black (ABS I think [I've been reading as you can see]). The black pipe disappears into what looks like a larger diameter black tee running north and south behind the sheet rock. The leaking water is emerging right at the point where the arrow identifies the "inlet." I've read that PVC and ABS have different dimensions and can't be joined except by a special contrivance. My reading further indicates that this connection is called a "slip joint" which is the wrong way to make the connection apparently.

    Am I right in believing that either I go to a black tail piece to match the rest of my drain system, or discover how to make my black/white connection correctly? When my father finds out that my wife is using his WWII helmet to collect that dirty leaking water, there will be hell yo pay.
     
  12. Feb 21, 2010 #12

    Nestor_Kelebay

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    Packy:

    I'm not a plumber. Redwood is.

    However, there is a standard dimension for kitchen sink and bathroom sink tail pieces. The outside diameter (OD) for kitchen sink tail pieces is 1 1/2 inch while that for bathroom sinks is 1 1/4 inch. So, regardless of what the tailpiece is made of or what colour it is, the trap adapter will be made to fit snugly around a pipe of 1 1/4 or 1 1/2 inch outside diameter. That means the trap adapter should fit around your tail piece snugly no matter what it's made of.

    Now, before you take anything apart, use a mirror and a bright light to confirm that the water is leaking out at the top of the trap adapter. It could be leaking out higher up and just running down the back of the tail piece where you don't see it, and accumulating on the top of the trap adapter.

    Once you confirm that the leak is at the top of the trap adapter, then the fix is to repair the seal between the trap adapter and the tail piece. There are two ways this seal is made:

    1. The threaded cap at the top of the trap adapter may have a lip molded into it's inside diameter that makes the seal, or

    2. there won't be any lip on the inside diameter of the threaded cap. Instead, you'll have a bevelled nylon washer under the threaded cap that makes the seal.

    If you see a "lip" molded into the inside diameter of the threaded cap, then it's that lip that seals around the tail piece. You can probably fix the leak by cleaning both the OD of the tail piece and putting a new threaded cap on with the same kind of lip on it. Sometimes they sell the threaded caps separately, but if they don't, you'll just have to buy a new trap adapter and just use the new cap to replace your old one. If you can find the name of the manufacturer on the old trap adapter, it'd be best to buy a new trap adapter made by the same manufacturer. That way the caps will be identical. But, more often than not, the cap from one manufacturer's trap adapter will fit on trap adapters made by other manufacturers, so they're somewhat interchangeable in that respect.

    If you have a beveled nylon washer under the cap, then it's easier. You can buy a replacement beveled nylon washer at any hardware store or home center. They come in two standard sizes; 1 1/2 inch for kitchen sinks and 1 1/4 for bathroom sinks. Every hardware store and home center will carry both.

    So, you need to confirm the source of the leak. Then determine whether it's the cap on your trap adapter that makes the seal or a beveled nylon washer under that cap, and replace the cap or the washer accordingly.

    The leak will only occur when the sink is draining, so you'll probably need to get your wife involved in pulling the drain plug on a full sink to confirm the source of the leak.

    Redwood may want to add to this if he can see anything I missed.
     
    Last edited: Feb 21, 2010
  13. Feb 21, 2010 #13

    Redwood

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    Hi Packy,

    The tailpiece does not matter if it is black or, white...
    It is tubular which measures 1 1/2" on the OD...
    Both Black and White tubular are made of Polypropylene.
    Once you get past the slip joints to where the pipe is glued together the pipe is ABS as yours is black. The incompatibility of PVC and ABS is simply that you cannot cement ABS and PVC together. It does not seem to apply in your case.

    I would very carefully check to make sure the water you see is not coming down from the basket strainer connection.

    If it is the slip joint at the trap you will find the slip joint washer is split and needs to be replaced. If the washer is not split and it leaks worse when you tighten it more, the slip joint adapter is probably cracked and needs to be replaced.

    This link may have some useful information for you. How to fix Leaking Sink Drains
     
  14. Feb 22, 2010 #14
    Unintentional comic Genius. I reread that over and over and just kept laughing. Was he being serious? If he was that's even funnier.
     

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