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Cistern fill valve replacement (won't stop filling!)

Discussion in 'Plumbing and Central Heating' started by sceptre0, 23 Aug 2021.

  1. sceptre0

    sceptre0

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    Hi all,
    Our toilet cistern fill valve won't cut off when the level reaches where it should. I replaced the diaphragm a couple of months ago due to very slow filling and now this issue started today.

    So, I guess there is something not right with the valve - is this a suitable replacement ?
    https://www.screwfix.com/p/fluidmaster-bottom-entry-fill-valve/84007?_requestid=220029

    My next challenge is the houses previous owners decided to box in the isolation valve just beneath the cistern so I have to try and remove some tiles to gain access! :(

    Thanks.
    Anthony
     

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  2. sceptre0

    sceptre0

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    For reference, it's a SIAMP valve, at least 13 years old
     
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  4. just pumps

    just pumps

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    Yes the fluidmaster will do, others may tell you to get the one with the brass shank.
     
  5. sceptre0

    sceptre0

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    Thanks.
    What would be the advantage of the brass shank ?
     
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  7. just pumps

    just pumps

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    Less likely to cross thread the nut when tightening. Thats all.
     
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