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Very slow leak in a pressurised heating system
Nearly a year ago I changed the old vented system to a sealed one,
whilst also adding new rads and splitting it into zones. It all works well BUT the pressure falls VERY slowly, probably from 1 bar to 0.7 bar over about 6 weeks. I can't find any dampness around the rad valves or visible joints so have resigned myself to waiting for the leak to get worse before I can find it. Are there any suggestions on how to find the leak, or for anything I can add to seal the leak (probably not a good idea)? The GlowWorm book suggests a minimum pressure of 1 bar, is this just to stop local boiling in the heat exchanger? Dave |
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