ᐅ Is it practical to use a conduit intended for building services as a preparation for fiber optic installation?

Hello everyone,

We just had electrical and water lines installed, and our earthworks/landscaping contractor wants to close the trench again soon. It’s about 15 meters (50 feet) in a straight line. A Kraso 4-way multi-duct (90mm (3.5 inches), 2 ducts free) is being used. Now I need a quick solution for an empty conduit so we don't have to reopen the trench later; fiber optic (Telekom or O2) is planned to be installed in about 8+ months.

The local building materials supplier says there is nothing ready-made available, but would simply install a DN75 (3-inch) plumbing pipe.

Is there currently any reason not to do this? I found Kabuflex DN75 (3-inch) recommended through the search function, but I can’t find a dealer nearby who stocks it.

Also, should both free ducts be extended to the property boundary, or is just one enough?

Thanks!

HT pipes are actually not designed for outdoor use. It’s better to use KG pipes for that. It’s important to include a pull cord inside (or have it included). Later, when pulling cables, you should add a new pull cord at the same time. That way, one cord is enough. Alternatively, armored insulating conduit can be used, but this is usually not available in larger diameters at most hardware stores, so I would install several of them.

I used Kabuflex. It can also be ordered online and delivered.

We were told back then to avoid any corrugated pipes/Kabuflex at all costs. So, we simply used a rigid conduit, and they pulled the fiber optic cable through it over a distance of about 40m (130 feet).

Kabuflex is smooth on the inside and even has the pull wire already integrated. When I checked with the network operator (telecommunications was installed together with electricity), it was approved. Installing it is significantly less effort compared to using standard sewer pipes (also known as KG pipes).

filosof schrieb:

I used Kabuflex. You can also order it online and have it delivered.

Unfortunately, not available by tomorrow anymore, and it was also not in stock at two other building material suppliers nearby.

Tolentino schrieb:

HT pipes are actually not meant for outdoor use. KG pipes would be better for that. It’s important to include a pull cord inside (or have it installed). When pulling cables later, add a new pull cord at the same time. Then one is enough.

It will probably be blown in here, but I would still consider installing a pull cord.