Tim O
September 08, 2022

Hi Gents, I have a new hydronic system with Caleffi Twist Flow Manifolds. It was installed last November and ran it through the first Winter and it performed very well. I'm flushing/refilling the system before the next heating season begins. A tiny bit of sediment and very brown water (Fernox?) remains in the Twist Flow flow meters. The water in it is very dark, rusty/brown and makes it difficult to see the meter flow marks. Even after flushing/filling with clean water, the flow meters aren't clearing the brown/rusty looking water. Is there a method to clear the meters without removing them?

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