ᐅ Ground connection for brine-to-water heat pump with multiple service lines?

Hello everyone, I have a question and hope to gather some input:

How SHOULD the piping for the brine lines (ground loop) be installed when entering the house? Does it need to be routed through water- and gas-tight conduits, or are standard sewer pipes (e.g., PVC drainage pipes) sufficient?

We are currently preparing the construction plans and I want to inform the architect about which penetrations should be included in the utility room. Otherwise, he will probably just say, "Ask your heating installer or our building services partner (for a fee)."

Perhaps someone here has installed a brine-to-water heat pump and can directly advise on what is important regarding the entry into the utility room. Unfortunately, drilling companies are so busy that you have to wait quite a while even just for a quote.

Thanks in advance!

Stephan— schrieb:

Perhaps someone here has installed a brine-to-water heat pump and can directly tell me what to consider when routing it into the utility room.

We used sewer pipes (KG pipes) for this. The multi-duct entry is only for the "standard" utilities.

Great, so DN50 should be sufficient since the brine pipes are probably 32mm (1.25 inches). In total, then 2x DN50 for supply and return.

2x 100mm (4 inches) PVC conduits for the brine-water heat pump. The plumber will definitely complain if you use 50mm (2 inches). Then, of course, the multi-service entry, and additionally, we have 3x 100mm (4 inches) PVC conduits for "miscellaneous." Currently, these are intended for the pressurized cistern supply line, outdoor water supply for the bike shed, and additional cables going outside (signal and power).

We are using 2x 100mm (4-inch) Doyma ring seals.

Is this in the basement? Is it a waterproof (WU) basement? Is a radon barrier required? With so little information, how is one expected to provide professional advice? Post #5 is certainly the best but also the most expensive solution.