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Slow drip in water tank ballcock valve

Discussion in 'Plumbing and Central Heating' started by Mick_Factor, 31 Aug 2015.

  1. Mick_Factor

    Mick_Factor

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    Hello,

    There is a slow drip in the attick water tank. To explain in detail, after use, e.g. flushing the toilet the tank refills quickly. Then the rate slows to a trickle and then an ever slowing drip (maybe 1 drip every 10 - 20 seconds). The thing is this drip could last all night, 12+ hours without any water being used in the house. It doesnt seem to ever shut off. If I depress the ballcock to add extra water into the tank it will then shut off.

    The tank is the black plastic kind.

    Do I need to change the ballcock and valve?

    Regards,
    Michael
     
  2. Newboy

    Newboy

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    Just a washer change in the ballvalve
     
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  3. Nige F

    Nige F

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    If the noise is driving you mad - tie a piece of string for the water to run down - temporary job but it won't drip
     
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  4. Mick_Factor

    Mick_Factor

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    2 great suggestions. Thanks. I wouldnt be half as bothered if it wasnt for the noise.
    Ill tie the string and change the valve/ballcock.
     
  5. Mick_Factor

    Mick_Factor

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    * change the washer.
     
  6. HERTS P&D

    HERTS P&D

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  7. JohnD

    JohnD

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    If you don't like tinkering, just fit a new valve. The Pegler Prestex Part 2 is probably the best you can get.
    http://www.screwfix.com/p/pegler-prestex-float-valve-part-2/27627
    You can buy an inferior valve if you feel you need more practice changing and repairing them. Read both pages of reviews.

    If you do like tinkering, fit a new valve, then take the old one apart on the kitchen table at your leisure, clean it up, fit a new cone and washer, and put it next to the tank, in a plastic bag, ready to swap back in 10 or 20 years when it needs doing again.
     
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  8. Mick_Factor

    Mick_Factor

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    I replaced the washer. Verdict is out on wether the drip has stopped yet. I havent had time to check a few hours after use.

    However now when the water flows through the valve it vibrates/shudders really loud. What is wrong?
     
  9. Newboy

    Newboy

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    water hammer - try turning the stopcock back half a turn
     
  10. JohnD

    JohnD

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    Should have taken my tip.
     
  11. muggles

    muggles

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  12. Mick_Factor

    Mick_Factor

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    From the replies it seemed like the easier option was a washer change.

    Now I will change the valve and put a metal plate on the outside of the plastic tank (which is currently missing).

    Is that a job I can do easily? Is the metal plate easy to install?
     
  13. bri160356

    bri160356

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    Good recommendation.

    I get fed up with noisy float valves;

    Recently tried this one; but just a bit too noisy, creaky, groany and takes too long to turn off completely,....but that’s just how they are.



    Also this one; ditto.



    So I tried this one;.....very quiet, quick fill and shuts off instantly with barely a whisper,...... “Silent Night”....excellent.


    There is nothing intrinsically wrong with the ‘traditional’ float valves but if you want a fill that’s as quiet and quick as possible the ‘Fluidmaster’ is very good.
     
  14. DIYnot Local

    DIYnot Local

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