Recent content by preece

  1. preece

    How to diagnose the cause of pump over

    I really don't really understand how it could just be a cold feed blockage. If it was due to water expansion then I would only expect a small amount of overflow, not the large amount of gushing water that I actually see. I suppose if it's often the case that blockage occurs where the cold feed...
  2. preece

    How to diagnose the cause of pump over

    Yea I read that blocked cold feed could be the cause, but I can't understand why a blocked cold feed would cause the hot water to gush out of the vent when the pump kicks in. Presumably the cold feed here means the cold pipe as it leaves the f&e tank, so a blocked cold feed would simply prevent...
  3. preece

    How to diagnose the cause of pump over

    Recently my CH system is getting Pump Over, but I unsure how to figure out the cause. 1. Seven minutes after switching on, hot water pours through the vent into the CH header tank. ( Nb. the pouring is like a tap turned on ). 2. This happens with either water & heating, or just water. 3. The...

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