ᐅ Discoloration Flow Rate Regulator

Hello everyone,

We have two heating circuit manifolds in the house, one in the basement and one in the attic. The flow meters in the basement are all clear and easy to read. In the attic, they are completely discolored.
Why is that? Can it be fixed? Does it have negative effects on the heating circuits in the attic?

It’s the same for us, I don’t have any explanation either.

It seems like something is oxidizing somewhere?

Exactly. For example, towel rails in the bathroom?
With us, everything remains clear.

Yes, but it only operates with an electric cartridge, so it is completely independent of the heating circuit.

Then I would keep looking, otherwise you’ll soon see nothing anymore. Just Google it, you’re not the first.