Expansion Vessel - Not sure abouts its purpose | Central Heating Forum | Plumbers Forums

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Expansion Vessel - Not sure abouts its purpose

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Rob Foster

Rob Foster

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Can somebody please explain the function of the expansion vessel on my heating. Is it to absorb the increased volume of water when its hot or/and to be a reservoir of water to top up the heating system when there are small drips Many thanks
 
For expansion and contraction eg when your heating system is hot the water expands
 

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