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Unvented Undersink Water Heaters. For D.I.Yers.

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Carrying on from a recent thread about the potential dangers of amateurs installing unvented undersink water heaters incorrectly….. Click on this

 

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    Combi boilers need two expansion bottles when there’s a water meter, in addition to the heating circuit expansion bottle it needs a mini expansion bottle on the incoming cold water main.

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    Combi boilers need two expansion bottles when there’s a water meter, in addition to the heating circuit expansion bottle it needs a mini expansion bottle on the incoming cold water main.

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