Got a problem with my U Bend on my kitchen sink

[DanielDeronda]

Hi

I've got a problem when trying to reconnect my U bend underneath my kitchen sink.

I've been trying to clean out all the gunk that has built up from using the sink, so I removed the u bend pipe underneath the sink, removed any extraneous matter that may be causing any blockages.

However, I have a problem when reconnecting the pipe. It is a compression joint. One of the ends connects perfectly, but for some reason, I can't connect the other end. I have a couple of washers (1 black & rubber, 1 blue & plastic) & the white threaded compression cap. The black washer has a tapered feel on 1 side.

It has worked fine before, but stupidly I forgot what order the washers/cap go in & how they connect to the pipe.

Can you please advise what I need to do? I don't want to bring out a plumber as I'm sure it's a simple job!!

 

[Plumbstar Tom]

Nut, blue, black (tapering towards male thread), male thread

Take some pics if you want better help

 

[snowhead]

The tapered black washer closes the gap between the pipe and the socket it fits in
The Blue washer allows the compression nut to spin freely to squash the black washer.

 

[DanielDeronda]

Hi Tom

Can't seem to send pictures from my mobile to my PC. Is there any other way I can get the photos to you?

 

[DanielDeronda]

The tapered black washer closes the gap between the pipe and the socket it fits in
The Blue washer allows the compression nut to spin freely to squash the black washer.

Can you send me a photo with what this looks like (or a link?) as I can't send photos on my mobile.

 

[ShaunCorbs]

like this

 

[DanielDeronda]

Ok, I have the white plastic compression cap that I think I want to connect the 2 pipes. I have 2 washers, one blue & plastic, one black & rubber. Do these go inside the compression cap or inside one of the pipes. THe compression cap has a tapered feel inside as does the black rubber washer.

Do I have the tapered side of the black washer facing in or out?

Sorry if I seem to be seeming a bit thick, but it's difficult to embed images. I've attached a generic u-bend image with the black washer.

One end of the connection is fine, but I can't seem to replicate the other. I have unscrewed it but it seems to have different washers.

Thanks

 

[Stigster]

Hi Daniel, you may have missed ShaunCorbs' post just above your last one. He has posted a really good cutaway picture showing the correct order and orientation of the components in your waste fitting.

 

[DanielDeronda]

Thanks for the reply, I don't seem to have the white washer inside the black one. Is this important? I seem to be able to connect the fitting but it doesn't stay on for more than a few minutes. I'm getting increasingly frustrated, as it seems such a simple job :90:

 

[JCplumb]

The white washer inside the black one is the waste pipe.

 

[JCplumb]

Put the compression nut over the waste pipe, then the blue ring. Then the black washer - make sure the taper is facing away from the compression nut.
Then the pipe inserts into the trap, you push the black washer up into the trap until it stops (the tapered part should be inside where the waste pipe fits in), then push the blue ring and compression nut up and tighten.

 

[Plumbstar Tom]

PM me the photos if you want?

 

[JCplumb]

I've just assembled one and took pics, this should help you out.

Put the components on the pipe and offer up to the trap.


Push pipe home in trap socket.


Push black rubber washer into the socket of the trap.


My red plastic ring is blue in your case, push it up to the rubber washer, then push the compression nut up and tighten. Voila!

 

[DanielDeronda]

Tried to reconnect as shown with the JPEGs & it seemed to work, but when I ran some water through the sink, there was a leak!!

I think I'll have to get a plumber in, as I think it may be to do with the shoddy installation of ,y new washing machine. I may also get a new u-bend as well.

Thanks for the help, but I think I'll have to admit defeat!!

 

[DanielDeronda]

Sorted now, it needed a few new spare parts, but the plumber tested it & there were no leaks & we noticed where the blockage was affecting my washing machine's performance. It had happened when the original installation took place. Wont be using this particular retailer again for any more white goods!!