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Adding inhibitor via the filling loop

Discussion in 'Plumbing and Central Heating' started by Jono11, 26 Sep 2015.

  1. Jono11

    Jono11

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    Hi all

    I wanted to add inhibitor to the system and got some Fernox F1 express so I could add it through the filling loop, the guy in the Fernox website made it look so easy. However his boiler was slightly different to mine and now I am unsure which side of the filling loop I should add the inhibitor to. My boiler is a Potterton Linea 24 and one side of the filling loop has the water tap and the other has no tap.

    Any help as to which side I put the inhibitor in would be much appreciated.

    Thanks
    Jono
     
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  3. oldbuffer

    oldbuffer

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    The inhibitor MUST go into the boiler primary circuit (normally into the return pipe), not into the cold water feed. Normally the boiler primary pipes (the flow to and return from the radiator circuit) are 22mm or 28mm in diameter, while the cold feed is in 15mm pipe. There should be a an isolation valve (and a check valve) at the cold water feed end and another isolation valve just before the flexible pipe connects to the boiler return.

    Try and post a picture if you want a more definitive answer.
     
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  4. Jono11

    Jono11

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    Hi Oldbuffer

    Pic attached
     

    Attached Files:

  5. Boilerman2

    Boilerman2

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    the one on the left - there is no isolation valve, only a non return valve
     
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  6. Jono11

    Jono11

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    Thanks for that
     
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  8. Jackrae

    Jackrae

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    That looks more like a filter than a non-return or do you mean second from left
     
  9. Biggles..

    Biggles..

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    Left pipe is an incorrectly installed y strainer.

    Boiker looks Vokera, so pipe layout isn't the normal config

    If I were you, I'd buy the cans and add through a radiator or towel rail.
     
  10. Dan Robinson

    Dan Robinson

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    Didn't realise @transam was fitting Vokera? :LOL:
     
  11. gigz

    gigz

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    Drain it down, cut the strainer into the return pipe (in the same orientation), then pour the inhibitor directly into the pipe before you fill up.
     
  12. Dan Robinson

    Dan Robinson

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    Potterton Linea :LOL:
     
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