Recent content by twace

  1. T

    how do i add sludge remover to a central heating system

    a one litre bottle but I am now wondering if I should have got sentinel 800. It is a sealed boiler
  2. T

    how do i add sludge remover to a central heating system

    I have a wall mounted valliant boiler and I have an issue with sludge. Can anyone give me an idiots guide to how I get the sludge remover into the system. I bought Senitel X400 today ?
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