Kitchen plumbing

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Shoeless Rver

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Texas
We are not fixit people, at all. We've had several leaks under the kitchen sink so we decided to replace all the plumbing. When we began to reassemble it we cant figure out why the piece that goes into the wall doesn't have any threads on it. Do we just shove it on the wall?
 

djw2112

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It does not have any threads because it is probably a glue only piece.  To connect those you need pvc primer and glue, the primer is not manditory but to do a good job it is.  But keep that stuff away from everything plastic based, such as entension cords and anything else that is plastic because it will desolve it, i found out the hard way. 

First always do a dry fit and make sure you do a witness mark so you can line up the marks after the glue is on, you only have a few seconds.

To glue them you put primer on both pieces just swipe it around the pieces on the smooth part (just where they touch, nowhere else)

Then put the glue on both of them after about 10 secs

Then immidiately (seriously immediately) put the two parts together and give it a quick turn back and forth lining up your mark when you are done..

The glue will set very fast and you will not be able to get them apart. 

Can you show us a picture of what it looks like, it might be a gasket seal type where you put them together with a big plastic nut on one side with a plastic gasket.
 

Gizmo100

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Sep 28, 2018
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Since you took it apart I don't think you will need to glue it to put it back together.

I Would do a search on you tube for "Kitchen water trap assembly" and look for one that resembles what your are working with under your sink.

This is a link to what I think you may need.

https://www.youtube.com/watch?v=1b0asFPDzfA
 

Shoeless Rver

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Sorry you went to so much trouble to answer that. The pipe that comes out of the wall has a threated nut that LOOKS like it goes to a pipe with threads. We disconnected everything from the sink basket first then took the whole set up to Lowes. They put together the same exact thing we took in. The end that goes into the wall (on both new and old piece) doesnt have any threads at all.
As for the picture, maybe tomorrow. We've had a bad day with things breaking......lawnmower, sink plumbing, and a metal hindge on our screen broke into as well. Couldnt even close the door. It is now cocktail time.
 

djw2112

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Shoeless Rver said:
Sorry you went to so much trouble to answer that. The pipe that comes out of the wall has a threated nut that LOOKS like it goes to a pipe with threads. We disconnected everything from the sink basket first then took the whole set up to Lowes. They put together the same exact thing we took in. The end that goes into the wall (on both new and old piece) doesnt have any threads at all.
As for the picture, maybe tomorrow. We've had a bad day with things breaking......lawnmower, sink plumbing, and a metal hindge on our screen broke into as well. Couldnt even close the door. It is now cocktail time.

No trouble at all :)  sounds like what you need is a strait piece with two compression fitting, one on each end. 

One end (wall side) has a female ring that fits into the nut on the wall, there should be a plastic compression fitting on that sleeve.    What does the other end look like, strait sleeve?

Is this what you see comming out of the wall?

 

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wackymac

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Ocala, FL
It does not have any threads because it is probably a glue only piece.  To connect those you need pvc primer and glue, the primer is not manditory but to do a good job it is.  But keep that stuff away from everything plastic based, such as entension cords and anything else that is plastic because it will desolve it, i found out the hard way. 

That's assuming the pipe is white which would make it PVC.  If it's black it would be ABS which would use a different cement.
 

djw2112

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wackymac said:
It does not have any threads because it is probably a glue only piece.  To connect those you need pvc primer and glue, the primer is not manditory but to do a good job it is.  But keep that stuff away from everything plastic based, such as entension cords and anything else that is plastic because it will desolve it, i found out the hard way. 

That's assuming the pipe is white which would make it PVC.  If it's black it would be ABS which would use a different cement.

+1
 

Gary RV_Wizard

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West Palm Beach, FL
Probably not glued (PVC cement).
The joint to the pipe in the wall is usually a compression fitting rather than glued (so you can take it apart in the future). Either you lost a piece on your way to Lowes or they didn't give you quite all the parts you need. Can't tell exactly what you need without knowing/seeing what you have in hand, but the pipe in the wall will be 1.5" diameter pipe.  You need an adapter that has  compression fitting for that size on one end and whatever threaded part will match what you have on the other end.

It may look something like this, bit can't be sure without photos of what you have now.
https://www.amazon.com/Keeney-46WK-Straight-Extension-Coupling/dp/B000BO8EE4/
 

Hanr3

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Central Illinois
Compression fittings have a tapered ring (washer). This washer goes over the pipe and between the nut and threaded area. When the nut is tightened down the tapered ring is sandwiched between the two pipes filling any voids, thus making a water tight seal.
 

catblaster

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Kissimmee, Floriduh
  Really need a picture ! The piece coming out of the wall is probably 1 1/2 PVC or black ABS. If it does not have anything glued to it the it should have had an adapter glued on at one time or another. The adapter has a compression nut and ring that goes on the drainpipe which is downstream from the "p" trap. That pipe then slides into the adapter and is sealed by sliding the ring and nut to the adapter and tightening. Sometimes the pipe is too long and hits the back of the pipe in the wall and must be cut to length. Thats the best guess Ican give without a picture.
 
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