leaking pipe joint with main heat exchanger

  1. M

    Turbomax boiler leak

    I have a Vaillant TurboMax with a slow leak inside the combustion box at the union of the right hand side of the main heat exchanger. The leak is small as the pressure drops very, very slowly (I only found out about it by seeing water marks). There is evidence of limescale on the flood of the...
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