Clear tubing for fibre cable?

Circet are busy in the street, up poles, down inspection pits, splicing etc. FTTP is coming.

I'm hoping to persuade the installer to put the CSP in a boarded list loft.

To help with the install from the CSP to the ONT I was thinking of using this clear tubing with a draw string https://www.amazon.co.uk/Dcizlont-Clear-Plastic-Tubi... , suitably fixed to walls, rafters in the loft. Most conduit may be rigid but this is flexible.

Is this a bad idea?

Thanks

Not sure what a ‘list loft’ is ?

The CSP is most commonly fitted externally* for Openreach installations. Then a cable is run from the ONT to CSP and spliced through.




*There will be plenty of anecdotal tales of CSP’s sited in weird and wonderful places, by accommodating installers. The norm however is as described above.

Your tubing looks too tight. And how are you going to get a drawstring in there?

I fitted some 20mm conduit in my loft. Does the job nicely (the joints aren't glued to make it easier). I suspect that anything narrower might be asking for trouble. Sure it will be do-able, but might be annoying at the same time!

The internal diameter was 10mm but maybe I need to look at a larger diameter.

I could look at some round rigid conduit and leave the joints unsealed.

@zarjaz, the copper drop line enters the loft at the eaves. I was hoping the fibre would follow the same path hence thinking of the CSP in the loft, instead of fibre travelling down, to the CSP and then back up the wall.

I think you’ll have to cross your fingers you get an accommodating installer then.

10mm might be a bit tight by my reckoning too.

The internal fibre from my CSP to ONT is no more than 1mm diameter.My run was 18m and was mostly glued to the corner between ceiling and wall with a couple of holes drills through walls.
Difficult to see !
Excess fibre rolls up into a surface box with short fibre "lead" to ONT

My CSP is in the loft and te CSP to ONT is around 1m.

I had a sub-con do mine and had pre-installed conduit from soffit, through first loft and into the second.

In reply to a post by MHC:

My CSP is in the loft and te CSP to ONT is around 1m.

I had a sub-con do mine and had pre-installed conduit from soffit, through first loft and into the second.

I refer the learned gentleman to my first reply to the OP

https://forums.thinkbroadband.com/fibre/t/4783611-re...

In reply to a post by rarrar:

My run was 18m and was mostly glued to the corner between ceiling and wall with a couple of holes drills through walls.

I would not have "glued" it, as you are causing issues in the event of it needing to be replaced - a job and a half, and if its a OR bod, they will probably lay a new one. or is this your own kit

In reply to a post by rarrar:

Excess fibre rolls up into a surface box with short fibre "lead" to ONT

from the above it seems you have added your own kit to the ont.

Edited by Taras (Sun 14-Dec-25 10:09:36)