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Cistern Fill Valve - location of black rubber washer

Discussion in 'Plumbing and Central Heating' started by Possom, 21 Jul 2017.

  1. Possom

    Possom

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    The pic below shows the bottom of a fill valve which is to be located within a toilet cistern.

    The conical shaped black rubber section at the top of the pic would be within the cistern, and I'm fairly sure from the white plastic washer down would go on the outside of the cistern.

    Does the flat black rubber washer marked with a red arrow go on the inside or outside of the cistern? It's not clear from the instructions.

    Thanks.

    upload_2017-7-21_16-43-0.png
     
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  3. Ian H

    Ian H

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    Outside.
     
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  4. Possom

    Possom

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    Cheers Ian!
     
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  5. Ian H

    Ian H

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    If you have a blank for the other side then the threaded part of that needs to go on the outside of the cistern. I learnt that one the hard way!!
     
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  6. Possom

    Possom

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    The parts pictured are the only ones I have for it. I hadn't unscrewed any of the parts when I took the photo - that's the way it was sent from the manufacturer.
     
  7. Steelmasons

    Steelmasons

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    The type of cistern will depend upon which type seal to be used.
    If a porcelain cistern use the conical seal , if a thin plastic cistern then use the flat one.
    The plastic washer should be used between back nut and cistern , disregard the rubber seal not used.
     
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  9. Possom

    Possom

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    I'm not saying this is not correct, though the fill valve pictured is that which was supplied by the cistern manufacturer to be fitted to this cistern. So I would have thought they would no include an incorrect rubber washer for another type of cistern.

    It's a porcelain type cistern.
     
  10. Steelmasons is correct :)

    Possom,remember you have purchased a kit of parts often manufactured by different companies in different countries with varying quality and compatibility issues.

    The fill valve and other parts are often supplied as universal parts and your picture of the fill valve shank with the various washers in position has zero correlation on installation.

    Looks like your wc kit is an internet or a diy shed purchased bundle,buying a bare cistern/pan and adding a quality fill valve and a quality syphon from a local plumbing merchant could cost a little more but its worth it.


    Good luck :!:
     
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  11. dilalio

    dilalio

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    Indeed... on a thin plastic cistern casing, the cone washer would place a point load and deform the plastic around the aperture, possibly even splitting it if it was old and brittle. At the same time, the thin plastic would cut into the cone rubber.
     
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  12. Possom

    Possom

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    Thanks very much for the clarification.

    Yes, the fill valve and the syphon certainly don't feel of good quality, and neither does the dual push button on top of the cistern.

    Though the quality of the cistern/pan is good.

    I hadn't thought about getting a different syphon and fill valve. I'll look into getting a better quality parts. Cheers!
     
  13. Fluidmaster products are my first choice,
     
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  14. dilalio

    dilalio

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    Agree.
     
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