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CH Boiler has airlock

Discussion in 'Plumbing and Central Heating' started by Rob G, 5 Oct 2020.

  1. Rob G

    Rob G

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    Automatic air bleed valve - can I put one in a boiler housing?

    I should have foreseen this!! I'm 90+% through the replacement fitting of a new CH boiler - oil fired, external wall hung, 3 ft thick stone wall. So the water pipes put in 25 years ago aren't going to get changed!

    The problem is that the return pipe is now having to go from the bottom of the case to the top where the flue condensing takes place, and this inevitably causes an airlock. I bled it out yesterday by releasing the coupling to the boiler - then water flowed through happily.

    My options are to put a 22/15mm T at the high point of this return pipe and a manual bleeder, or preferably put an automatic one on the branch; there's a bit over 100mm above the pipe to the casing top plate.

    Many thanks for any guidance.
    Rob
     
  2. Terrywookfit

    Terrywookfit

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    No problem, All the manufacturers fit them,

    Is your system fully pumped.
     
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  4. Rob G

    Rob G

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    Thanks Terry
    Because I run a wood burning stove with back boiler, I have a Neutraliser to blend the two sources, so there is a pump to the oil boiler and another for the CH. The feed from the wood burner is gravity with nothing potentially blocking the flow.

    When you say all manufacturers fit them, this is a Grants boiler and there is what I take to be a safety valve on the top of the boiler but it doesn't seem to have a bleed capacity.
     
  5. Terrywookfit

    Terrywookfit

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    Which model is it ?
     
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