ᐅ Install conduit for house connection

Hi!

Since we currently have a trench for wastewater, we would like to lay a conduit for electricity and telecommunications as well. The utility company’s electrician said it’s no problem as long as we follow the regulations, etc.
So, he definitely said we should install two DN110 Kabuflex conduits. That’s fine, but I can’t figure out how to connect this with the multi-utility connection (according to the drawing, we have BD14/50). From my understanding, I would need a DN110 to DN50 reducer, but such a fitting does not exist from Kabuflex!

Does anyone have an idea?

Here are the connection fees including everything.
At best, you save about €100 (approx. $110) by digging your own trench.
Why would you want to install pipes at your own expense, without any expertise, and then be responsible for any defects later, when this work is already covered by the connection fee? Or is it different where you are?

I wouldn’t do anything myself. In my case, the route for wastewater would not be the same as the one for the house connections anyway.

Hmm, good point. So our general contractor wanted to fill in the trench again, and I thought I could save myself the effort of digging it up again. I checked again, but re-excavating would only save about €213, which is almost the cost of the DN110 pipe! However, I expected to save more than that!

That won’t interfere with your process, especially if it doesn’t have any financial benefit.

What is the purpose of installing a DN 110 empty conduit and then reducing it to DN 50?
Just install the DN 50 and connect it directly at the main connection.
If the multi-utility connection is DN 50, there is no need for a DN 110 empty conduit.
Unless they meant to install two DN 110 empty conduits and you’re supposed to push the DN 50 pipe through the 110 one? And other trades as well (pulling cords included) in case it gets stuck during pulling.

Or am I misunderstanding something? That’s just my opinion.

guckuck2 schrieb:

That won’t interfere with your schedule, especially if the financial impact is neutral.

Yes, you’re right!

derkobi schrieb:

Why would you install a DN 110 conduit and then reduce it to DN 50?
Just lay the DN 50 pipe and connect it normally to the house connection.
If the multi-utility connection is DN 50, there’s no need for a DN 110 conduit.
Unless you meant laying two DN 110 conduits so you could push a DN 50 cable duct through the 110 one? And have space for other trades as well (pull cord included in case it gets stuck while pulling).

Or am I misunderstanding something? That’s just my opinion.

I guess it’s easier to pull the cable if the conduit is larger? As mentioned before, that’s what the electrician told me.
For fiber optic cables, for example from Telekom, at least DN 75 is required.

Out of curiosity, I would still like to know how to connect different DN conduits in a sand- and watertight way.
By the way, a pull cord is standard with Kabuflex!