1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Vokera Excell 80SP - Auto Air Vent Failure

Discussion in 'Plumbing and Central Heating' started by Antony2008, 3 Jun 2008.

  1. Antony2008

    Antony2008

    Joined:
    6 Apr 2008
    Messages:
    39
    Thanks Received:
    0
    Location:
    Yorkshire
    Country:
    United Kingdom
    Last night my faithful ? :confused: ? old boiler stopped delivering dhw. On first inspection there was very low pressure and a wet cellar head floor. I recharged the boiler to 1bar and traced the leak to the auto air vent, which was dribbling out from the aperture in the small black cap (water still flows regardless of it's tightness).
    A couple of hours before I found the problem, as the ch turned on I heard the upstairs radiator gurgling as if there were air inside (which is possible as I part emptied the system a couple of weeks ago when re-fitting a towel rad').

    A couple of points:

    What causes water to flow out of the auto air vent?

    Is the auto air vent servicable or do I just need to replace the auto air vent?

    Once fitted/serviced, should the auto air vent's small black cap be finger tight?, tightened then backed off ¼ turn? ??

    Are there any other measures that I need to take, such as check out another component that may have caused the problem, or any preventative maintainance that needs to be done.


    I'd appreciate anyone's input; many thanks in advance.

    Antony
     
  2. Agile

    Agile

    Joined:
    26 Jun 2004
    Messages:
    64,039
    Thanks Received:
    4,595
    Location:
    London
    Country:
    United Kingdom
    The cap should be gently tightened until you JUST start to feel more resistance. That will let air out but restrict the flow of water a little bit if it starts leaking.

    They are better replaced.

    They can sometimes be cleaned, boiling in citric acid is good.

    Its not a very common problem on your model.

    Tony
     
  3. Sponsored Links
  4. superdupergasman

    superdupergasman

    Joined:
    4 Jan 2008
    Messages:
    797
    Thanks Received:
    0
    Location:
    Edinburgh
    Country:
    United Kingdom
    You are just aswell to replace the AAV as its only 7 or 8 quid for a new one, just unscrews out the pump housing.

    Srew new one in with a little PTFE tape and jobs a goon un'

    I would diagree with tony and say leave the cap open a 1/4 turn as this allows the thing to do its job, getting rid of air out of pump if it gathers.
     
  5. Agile

    Agile

    Joined:
    26 Jun 2004
    Messages:
    64,039
    Thanks Received:
    4,595
    Location:
    London
    Country:
    United Kingdom
    Yes, I worded that badly but I knew what I meant!

    I have edited it so that others will know as well.

    Tony
     
  6. Sponsored Links
  7. Antony2008

    Antony2008

    Joined:
    6 Apr 2008
    Messages:
    39
    Thanks Received:
    0
    Location:
    Yorkshire
    Country:
    United Kingdom
    Thanks for your sound advice agile & superdupergasman. I sourced the AAV from the internet (£8.46 inc vat/postage, tho' took 2 days to arrive).
    A couple of wraps of PTFE and we're now able to shower at home :D !

    Thanks again.

    Antony
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page