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'Gargling' basin air admittance valve

Discussion in 'Plumbing and Central Heating' started by Geoff_Capes, 19 Jul 2017.

  1. Geoff_Capes

    Geoff_Capes

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    I have a basin making a 'gargling' noise. It looks like a 32mm (I think) S trap is fitted but space seems to be pretty tight under there. What's the best way to fit an air admittance valve?
    DSC_2670.JPG
     
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  3. aptsys

    aptsys

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    Might be best to tackle the cause. What other items are sharing the waste pipe?

    Looks to be plenty of space for an anti-vac trap though.
     
  4. Madrab

    Madrab

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    You may get away with an All in one or offset anti vac trap, if not then change it for an antivac bottle trap. All you'll need then is a couple of pieces of 32mm and an elbow
     
  5. Geoff_Capes

    Geoff_Capes

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    I have access to the soil stack which the toilet and and basin connect - could I / should I use an external air admittance valve there?
     
  6. aptsys

    aptsys

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    It depends what's causing the vacuum. As I asked before, what else is sharing that waste pipe?
     
  7. Geoff_Capes

    Geoff_Capes

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    From memory: basin, toilet and shower is on another branch that joins the main stack, but the gargling has been just when the basin tap is running.
     
    Last edited: 25 Jul 2017
  8. Geoff_Capes

    Geoff_Capes

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  10. Madrab

    Madrab

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  11. aptsys

    aptsys

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    Agree. Easiest to try an anti vac bottle trap in the sink. Looks like plenty of space there.
     
  12. Geoff_Capes

    Geoff_Capes

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    Thanks chaps.

    Just one more thing... would one of these be better than a bottle trap?
     

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  13. Madrab

    Madrab

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    3rd time lucky .... :cool:
     
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  14. Geoff_Capes

    Geoff_Capes

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    :giggle: Is that an all in one unit?? Sorry, all this is new to me (y)
     
  15. AGAS

    AGAS

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    ye crack on (y) you know what a little bird told me you may struggle :)(y)
     
    Last edited: 28 Jul 2017
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