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Discuss Toilet Cistern Overflowing (Picture Included) in the Valves & Taps area at UKPlumbersForums.co.uk.

  1. Nelder

    Nelder New Member

    Quick question please, the toilet cistern is constantly over flowing and I need to adjust the fill valve.

    Am I right in assuming that the part circled should turn so that it can be adjusted? Or do I just need to bend the ball cock arm?

    Thanks Phil.

  2. Nelder

    Nelder New Member

    If you lift the ball cock up, it does stop the water.
  3. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    Neither fit a new one.
    • Agree Agree x 2
    • Winner Winner x 2
  4. Nelder

    Nelder New Member

    ok thanks.
  5. Rob Foster

    Rob Foster Top Contributor!!

    Just for your info the part you circle is not the adjustment
  6. WC1

    WC1 Active Member

    Not a difficult DIY job, do not use cheap parts, Youtube is your friend.
  7. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    You tube get me so much work.:p
    • Funny Funny x 5
  8. CBW1982

    CBW1982 Plumber GSR Top Contributor!!

    Making sure you fit a part 2 or 3 and an isolation valve in the pipe feeding it. If you get like for like you need a double check valve also.
  9. Nelder

    Nelder New Member

    Thanks for your advice everyone.
  10. Nelder

    Nelder New Member

    Sorry what do you mean by part 2 or 3? Im guessing the check valve requirement is due to the lack of air gap?
  11. Rob Foster

    Rob Foster Top Contributor!!

    Look it up on Wras website
    Rob Foster aka centralheatking
    • Agree Agree x 1
  12. Best

    Best Trusted Plumber

    That is a fairly old HP ball valve.
    It also has a bend on the ball valve arm to keep the float off the side of cistern.

    Choice is to renew all the parts inside that valve (HP rubber washer, nozzle, brass split pin and probably washer for valve body to tail), or install a brass part 2 brass valve if it suits.
    The float angle and height on part 2 valves is adjustable by a brass bolt
  13. Ben-gee

    Ben-gee Plumber

    To be perfectly frank if it shuts off fine when you lift the arm up -
    1) replace diaphragm washer as it’s probably got stiff/distorted
    2) if it still needs lifting to shut it off, bend the arm.
  14. CBW1982

    CBW1982 Plumber GSR Top Contributor!!

    Sorry, the float valve you have is part 1 (old type) part 2 is brass and part 3 is plastic both with air gaps
    - correct :D but not needed if you install a part 2 or 3, an isolation valve is a requirement of water regs regardless, unless you opt for the repair option as suggested by some members.
  15. Tommo25

    Tommo25 GSR

    Replace with fluid master fill valve (brass shank) model.
    • Agree Agree x 2
    • Like Like x 1
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