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  1. K

    vaillant 828 turbomax-hot water probs.

    not really sure what you mean by the plate being sludged/scaled. sorry for sounding a bit thick but i'm not a plummer. what is the plate?
  2. K

    vaillant 828 turbomax-hot water probs.

    hi just wondering if anyone has any suggestion, i have a problem with my hot water but it's a bit strange. when there is a hot water demand with low pressure (just turning tap on quarter turn) the hot water is fine. but if tap is opened any further the hot water temp drops to luke warm. i have...
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