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float valve

A ballcock (also balltap or float valve) is a mechanism or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y Ramírez, a Mexican priest and scientist, who described the device in 1790 in the Gaceta de Literatura Méxicana. The ballcock device was patented in 1797 for use in steam engines by Edmund Cartwright.It consists of a valve connected to a hollow, sealed float by means of a lever mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises with it; once it rises to a pre-set level, the mechanism forces the lever to close the valve and shut off the water flow. This is an example of negative feedback and of proportional control.

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  1. B

    compact float valve

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  2. S

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  3. S

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  4. L

    Leak under cistern - connecting float valve to the water supply pipe, as per photo

    Hi When I screw the water connection back on to the float valve thread under the cistern, there is a leak when I turn the water back on. There are 3 fibre washers filling the gap. Does anyone know what I could do to stop the leak? Thanks you
    • LeighB
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    • Forum: Plumbing Jobs | The Job-board
  5. S

    Leaking toilet float valve

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  6. H

    Replacing a Float Valve

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  7. J

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  8. A

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  9. K

    Faulty float valve, or faulty immersion stat?

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  10. S

    How do I connect a normal sink tap outlet to a WC cistern 1/2 float valve?

    Hi everyone, nice to meet you all. I am a cistern collector and from time to time I like to test them. What I want to know is, is it possible to securely connect a normal sink tap to a cistern's float ball valve without it leaking? So I can turn on the tap and have it act as a water feed to...
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  11. J

    Exterior Float Valve

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  12. M

    Torbeck Bottom Entry Cistern Float Valve problem

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  13. V

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  14. R

    Toilet tank slowly over filling

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  15. A

    Water dribble

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  16. M

    Every time I turn off a tap my toilet starts to overflow?

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  17. N

    Hello from James - Inventor of the Nova-Flo

    Pleased to be part of this forum. Will be happy to offer any advice on installing our products or to hear from anyone with questions I can help with. James Barnham.
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  18. J

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  19. M

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  20. M

    PLEASE HELP! My RAK corner toilet is constantly running! It's like Niagara Falls!! =(

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