Introduction to a multidisciplinary department

3 m generally seem a bit short to me, because theoretically the protective conduit should reach up to the public road. You can always cut it off, but splicing is not so good. ;)

That's exactly what I think too, it's just 150€ more, you try to save where you can :)

How deep did you lay it? I thought about 20-30cm below the later wastewater collection pipe?

Wastewater is already quite deep with us at about 1.50 m. The multiservice line is at about 1.20, where only water is sensitive.

The wastewater end point is 1.5m deep at our place. The utility room must therefore be max. 1.20m deep. That's my problem. Above that would be 1 meter, somewhat too little, so almost only the 1.50m depth remains, or what do you think?

Whether 1 m is sufficient, you need to check, but generally, it should be frost-free in most places in Germany.

How did you do it? Placed underneath or on top with how much distance? Or rather, first rain/dirty water or first the house connections laid?