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JJuileche replied to the thread Heating bypass.An ABV should be adjusted so there's always some flow when needed. If it's fully closed or too restrictive, the pump might struggle. If you're unsure, a heating engineer can check and set it properly. I’ve used pm247.co.uk before, and...
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JJuileche replied to the thread Heating bypass.If your radiators have TRVs and there's no automatic bypass valve, the pump could struggle when they’re all shut. A bypass ensures proper flow and protects the pump from damage.
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