We are moving to a new flat. This flat has many empty sockets in the walls. These sockets are connected using empty corrugated pipes, so one can put additional cables through them.
I want to use these empty sockets/pipes to put CAT 7a cables into the wall, with CAT 6a outlets in every room.
My question is: How do I find out from where to where those empty pipes go?
I already tried two things:
- I tried to push a cable through them, and check where it comes out of the wall. This worked for some connections, but for many the cable gets stuck and I cannot find the other end of the pipe.
- I also tried to put a thread with a bit of paper on it into the pipes, and suck them out somewhere else with a vacuum cleaner. This also worked for some connections, but I need to check every other pipe end in the flat to find the correct one. And it makes a lot of noise (the pipes resonate).
I thought of pumping some sort of smoke into a pipe using a compressor, and look where it comes out, but I have neither a compressor nor means to produce smoke in a safe way.
Any other ideas?
Edit: Here is a picture of one of the sockets, with the CAT 7a cables already put through them: