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Tapping noise on bathroom ceiling when water drains

  • 24-02-2020 10:43am
    #1
    amargar
    Registered Users, Registered Users 2 Posts: 120 ✭✭


    This one is driving me crazy, every time the water drains on my bathroom (for example if I empty the bathtub or I empty the sink) there's a tapping noise coming from the ceiling of the bathroom (attic), that happens to be on the back corner of our 2 story house.

    I went to the attic to see where the sound is coming from and I saw a big black pipe going down (is this some sort of drain pipe?) and the noise seems to come from inside it, but I'm not 100% sure.

    You can hear the sound here, at the end of the video:

    https://www.youtube.com/watch?v=3m0TU6lXiBg

    Any help would be welcome!


Comments

  • #2
    fido_dido
    Registered Users, Registered Users 2 Posts: 69 ✭✭fido_dido


    I have a similar problem coming in my house. I keep hearing the tapping noise from the ceiling as well. When I checked the attic I couldn't hear anything there. @amargar, Were you able to figure out the issue?



  • #3
    redarmyblues
    Registered Users, Registered Users 2 Posts: 983 ✭✭✭redarmyblues


    https://www.boards.ie/discussion/2058056663/tapping-noise-on-bathroom-ceiling-when-water-drains

    I am not able to watch the video but it sounds like you have a water hammer, but not haven't heard the vid can't be sure.

    Google the term.



  • #4
    fido_dido
    Registered Users, Registered Users 2 Posts: 69 ✭✭fido_dido


    For me its really loud. Couldn't upload the video there to show. Had to zip it.

    Video.zip




  • #5
    greasepalm
    Registered Users, Registered Users 2 Posts: 5,581 ✭✭✭greasepalm


    Interesting as you say the noise is only there when draining sink or bath to drain.

    Is the immersion or tank still filling at the time of pulling the plug.

    My pipes have changed flow for waste into an outside wall gully which also takes water from the gutters.

    How big is the black feed pipe you are talking off and is it connected to water tank in attic.

    The only drain pipe for me up there is for cold water and if float fails it lands on extension roof.

    Most pipes up there for me are copper for feeding taps , immersion , etc

    Where the outside pipe drains i would be checking fasteners to make sure its not loose and hitting something nearby.

    Looked up water hammer and is more with pressure feeds and not drains.



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