Hi
What I don't understand though is that after the guy left this afternoon and I pressurised the system to 1.5 bar and then put the heating on, I watched the pressure rise to just over 2.0 bar (I also had the PR pipe disconnected to see if anything came out of it) and then the heating got to temperature and switched off. I then turned the heating off and the pressure (eventually) dropped (when the temp dropped below 50 ish) to under 1.0 bar.
Bear in mind during all this time the pressure hadn't gone over the 3.0 bar that I understood was needed to trigger the PR valve?
John
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