Discuss Help! - Noisy central heating system – not heating water well …… in the Central Heating Forum area at PlumbersForums.net
Thanks againHave a google of any open vented diagram, the F/E pipes are always behind the circulator on the circuit and never in front, that is the cause of your air ingress issues.
OK - i am following you - thanks for the explanation - will have to have a think about how i could replumb the pipes in practiceActually the later example shows the feed pipe is nearer the rear of the circulator than the front on the circuit. Still I don't think it's a reliable example (DIY website) , needs replumbing.
You can't pressurise an open vented HW cylinder but adding a single or twin shower pump should be straight forward enough.
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