Clicking sounds inside wall from pipe or from the toilet

[oheavingham]

Need advice around these clicking sounds. I posted last week, but I didn’t get much luck. This I have recorded the sounds. The sound appear to be around my toilet, but I don’t think the toilet is the issue but something behind toilet - in the wall and probably a pipe.

Hope you can help me.

I’ve attached the link to my old post below.

Clicking sounds when my neighbour runs their water - https://www.plumbersforums.net/threads/clicking-sounds-when-my-neighbour-runs-their-water.110485/

 

[SimonG]

Hard to hear over the extractor fan. Is it there only when you flush the crapper or regular away?

 

[rpm]

Big long screwdriver, place blade to different surfaces and the press ear to the handle, amazing what you hear.

 

[oheavingham]

Hard to hear over the extractor fan. Is it there only when you flush the crapper or regular away?

So I believe my water supply is connected with my neighbours and every time the clicking begins, it’s because they’ve flushed their toilet or used their sink.