Leaking pipe from sink

Murmansk

The pipe from kitchen sink is leaking where you can see on this photo

https://user.fm/files/v2-762d0fca79cbe45a672273cd1563f32c/Pipe.jpg

It'd be hard to put a new piece in as the lower end of the pipe is cemented in very neatly where it passes through block paving and the top end where it comes through the wall is quite well attached too.

So there's no scope to move the pipe at either end to insert a new piece and two junctions.

Someone's tried to seal the joint with no luck, I've tried to push PTFE tape into the gap but no joy.

Pipe diameter is 43mm

Any ideas? Thanks

Browntoa

Assuming plastic pipe then cut it above and below the leak and splice with a new length of pipe in the middle 

Murmansk

>>So there's no scope to move the pipe at either end to insert a new piece and two junctions.<<

Browntoa

Looking at the photo the bottom pipe fits in the collar on the middle pipe , where the leak is , and then the middle part fits in a collar on the top pipe . No easy way to remove it as both points should be glued

Murmansk

Browntoa said:

. No easy way to remove it as both points should be glued

I'd agree with you on that!
What I need I think is a suitable diameter of rubber joiner with a jubilee clip at either end - I've seen pictures of them for 110mm pipes so I'm going to search for one for a slimmer pipe.

Browntoa

There's a possibility that beading around the whole joint with an external grade sealant may stop the leak.

Obviously don't use the waste while it's drying

Murmansk

I think this is the answer - two of them and new bit of pipe:
https://www.drainagepipe.co.uk/plumbing-flexible-coupling-straight-42mm-50mm-p-MDC50/

Jackmydad

Murmansk said:

I think this is the answer - two of them and new bit of pipe:
https://www.drainagepipe.co.uk/plumbing-flexible-coupling-straight-42mm-50mm-p-MDC50/

I was going to post that I've seen flexible couplings somewhere. 
You know that you need to de-burr the inside of the pipe(s) that you have cut?

Murmansk

I'm interested why you mention de-burring the INSIDE of the cut pipe? I can't see how it would affect the join between the coupler and the pipe but would it have implications for the flow of water inside the pipe?

Jackmydad

You should de-burr inside and outside. If you don't the "rag" left inside picks up any solids in the water, and eventually blocks the pipe. Outside makes the pipe easier to insert and avoids damaging any seals.

EssexExile

Denso tape.