Come on John. A man with your apparent wealth of knowledge and wisdom in the world of heating and plumbing should be able to work it out.
I'll give you a clue.... PTFE isn't the solution . Perhaps Joe90 or easy123viessman can help on this one?
preciselyor is that not so much a window as the port where the water pipe is connected?
some not alldo you suppose a filter would trap those particles?
It seems to be going from worst to worse! Not being helped by posting his problems on multiple advice sites! Tony
Yes, but its the same people who frequent both sites!
If, as I believe, the noise is caused by air bubbles lurking at the top of the coils, I'm puzzled by all the time and effort you have spent not dealing with them.
Adding fresh water will of course introduce more dissolved air.
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