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heatra sadia unvented system. Overflow up tundish pipe

Discussion in 'Plumbing and Central Heating' started by tpenthouse, 22 Dec 2010.

  1. tpenthouse

    tpenthouse

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    Location:
    Stirlingshire
    Country:
    United Kingdom
    Hi All,
    Over this arctic few weeks in scotland I have been getting an overflow of water up and out of the overflow pipe at the tundish in my Megaflo tank / heating system. Whilst the outside end of the overflow pipe was frozen (maybe it still is?) I have built a wooden cover, filled with loft insulation and also fittedfoam pipe insulation. I am repeatedly placing a hot water bottle within the box and over the pipe. When feeling the end of the pipe it is wet and not dry / frozen.

    However I am still getting water coming up and out of the tundish overflow pipe. I never see or feel (wet) any water from the T&P value above so can only assume the water is backing up somewhere else. Is there any ideas as to what is causing this water to backup. Initially I thought that perhapos my air gap needed recharged but not sure how I can do this if the overflow / tundish pipe is constantly full of water.

    Ideas (please!)?
     
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  3. muggles

    muggles

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    Location:
    Daventry
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    You need to clear the blockage, I'd still say it's ice, get a blowtorch on it outside, get it nice and hot and see if that clears it. Then recharge your air gap
     
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