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  • FIRST POST
    • 50Twuncle
    • By 50Twuncle 6th Dec 17, 2:01 PM
    • 7,890Posts
    • 1,835Thanks
    50Twuncle
    Toilet Cistern has a mind of its own
    • #1
    • 6th Dec 17, 2:01 PM
    Toilet Cistern has a mind of its own 6th Dec 17 at 2:01 PM
    We keep on being woken up in the wee small houtrs by our toilet cistern - not only filling itself up - but also emptying itself !
    I can understand the filling bit - due to the increased pressure at 3 am - but "EMPTYING ITSELF !!
    The problem started about a month ago and it is now starting to concern me - (expense if I don't wake up)
    Will a replacement (dual flush) valve help or do we need a pressure reducing device in the feed ?
Page 1
    • Grenage
    • By Grenage 6th Dec 17, 2:45 PM
    • 1,324 Posts
    • 1,254 Thanks
    Grenage
    • #2
    • 6th Dec 17, 2:45 PM
    • #2
    • 6th Dec 17, 2:45 PM
    The flap is probably not getting a proper seal at the base of the cistern.
    • 50Twuncle
    • By 50Twuncle 6th Dec 17, 3:12 PM
    • 7,890 Posts
    • 1,835 Thanks
    50Twuncle
    • #3
    • 6th Dec 17, 3:12 PM
    • #3
    • 6th Dec 17, 3:12 PM
    The flap is probably not getting a proper seal at the base of the cistern.
    Originally posted by Grenage
    Thanks - does the flap come as part of the flush valve set up ?
    • getmore4less
    • By getmore4less 6th Dec 17, 4:10 PM
    • 30,783 Posts
    • 18,391 Thanks
    getmore4less
    • #4
    • 6th Dec 17, 4:10 PM
    • #4
    • 6th Dec 17, 4:10 PM
    Take the lid off and have look what's in there.

    There a few different options for in and out.
    • surveyqueenuk
    • By surveyqueenuk 6th Dec 17, 4:56 PM
    • 545 Posts
    • 1,904 Thanks
    surveyqueenuk
    • #5
    • 6th Dec 17, 4:56 PM
    • #5
    • 6th Dec 17, 4:56 PM
    When you have the lid off, make a note of any codes etched on the underside (if there are any) as this will indicate what model of bog you have.
    • Heedtheadvice
    • By Heedtheadvice 6th Dec 17, 5:53 PM
    • 640 Posts
    • 318 Thanks
    Heedtheadvice
    • #6
    • 6th Dec 17, 5:53 PM
    • #6
    • 6th Dec 17, 5:53 PM
    Sounds like a case of sleep walking to me!

    Some cisterns have overflow that vent into the pan. Check that the fill valve is sealing properly and that the water level is not too high.
    • flashg67
    • By flashg67 6th Dec 17, 8:08 PM
    • 2,294 Posts
    • 1,504 Thanks
    flashg67
    • #7
    • 6th Dec 17, 8:08 PM
    • #7
    • 6th Dec 17, 8:08 PM
    Turn off the water supply and see if the level drops - if it does, likely the flush valve is leaking. Or add some food dye to the cistern, and see if it leaks into the pan.
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