Waste Pipe Leaking - No Seal?

[Foresty Forest]

What should I do here? The 40mm pipe is a bit short, and I'm not sure what's happened to the seal. That's an attempt with some PTFE to create a seal.

The 40mm pipe is cut just long enough by a couple of mm.

Thanks

 

[terryplumb]

Is there a thread under the PTFE . If so the part that screws onto it should have a rubber seal within. Lower the big plastic nut to reveal it.

 

[Foresty Forest]

There isn't a thread. As far as I can tell, the nut is meant to just tighten the joint onto the bare pipe (with a seal I presume?). There isn't a seal either - I can't remember if there was one originally?

 

[terryplumb]

I think you may be wrong. Clean off the PTFE and take another look ,show us a pic. If there's no thread ,remove the lower nut off the Pipework and if there is no seal you need to fit one.