My recently new Gledhill indirect hot water cylinder is making a humming noise when hot water only is on the noise seems to be coming from the return side of the coil there is a gate valve on the return for balancing does it just need adjusting or is it something else can anyone help me out thanks
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- Thread starter Kmag123
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View the thread, titled "Gledhill indirect hot water cylinder making humming noise" which is posted in Central Heating Forum on UK Plumbers Forums.
Slightly close the gate valve
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