ᐅ Stainless steel potable water pipes: what are the disadvantages?

Why so upset? I’m telling the OP that PE is sufficient, but if stainless steel (VA) is used, then grade 316L (4A) is required, and that is more expensive. Now it’s up to them to decide.

I'm not annoyed.

Your posts just always come across as if only your opinion matters and no other. That's why I only pointed out that there are reasons why someone might prefer stainless steel over plastic.
You asked about that yourself.

hampshire schrieb:

Strange that you ask about the disadvantages and don’t seem interested in the advantages.

I’m already well aware of the advantages. That’s why I want to use them.
I just want to make sure I haven’t overlooked any significant disadvantages for me.

Mapress, or Ode, Sunpress, and similar systems are state-of-the-art. The advantage of stainless steel is that it is highly resistant to corrosion. Both plastic and stainless steel serve their purpose equally well. One person drives a car with four rings, another one with a star. Stainless steel is very high-quality and durable. The price will also be a deciding factor.

One disadvantage of stainless steel is the more complex installation process. How does the Raxinox from Viega compare in this regard? From what I understand, it can be installed almost as flexibly as plastic composite pipes, right? Has anyone had experience with this system?

If the choice for VA is only due to an aversion to plastics in drinking water installations (plasticizers, etc.), keep in mind that usually the pipes from the water utility to the house are already made of plastic pressure pipes.