Photo attached. Cheers.What size of pump is it, I can't read it
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Photo attached. Cheers.What size of pump is it, I can't read it
You don't really want water passing through the bypass when the valves are open so I wouldn't worry too much about that if the flow and return temps are ok at the Boiler.
I'm surprised it still bangs but you do need to rule things out like the lack of a by-pass before you can start to think of other possibilities,
I'll put my thinkin cap back on.
Reply to the thread, titled "Heating Bangs when switching off." which is posted in UK Plumbers Forums on Plumbers Forums.
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