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dual flush

A dual-flush toilet is a variation of the flush toilet that uses two buttons or a handle mechanism to flush different amounts of water. A lesser amount of water is designed to flush liquid waste and the larger quantity of water designed to flush solid waste.
The system was developed by Japanese sanitary product manufacturer TOTO in 1960. It was equipped with two levers and built-in hand-washer, and was also revolutionary in that it reused the water in the hand-washer for flushing. However, it was not well known outside, or even within, Japan. In 1976, American industrial designer Victor Papanek proposed the dual flush system in his book Design for the real world, but the first practical implementation was designed in 1980, by staff at the Australian sanitary-ware company Caroma, with flush volumes of 11 and 5.5 litres. The design caught on, and a redesign in 1994 cut water usage to 6 and 3 litres.The dual-flush toilet has become almost universally adopted in Australia, New Zealand, Singapore, and Israel, with its use in new buildings often mandated by legislation in those countries. The more complex dual-flush mechanism is more expensive than many other types of low-flush toilets.

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  1. A

    Old Style dual flush - short flush - press and release WANTED

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  2. M

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  3. J

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  4. A

    Which Dual Flush Push Button Do I Need?

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  5. D

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  6. J

    Help needed with Vantage Dual Flush Cistern

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  7. P

    Dual Flush Push Button on Toilet

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  8. C

    Question re dual flush valve in ideal standard toilet

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  9. D

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  10. C

    Fluidmaster 550 UK dual flush valve to 35mm flush pipe

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  11. S

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  12. W

    Any ideas how I could replace this with fluidmaster dual flush?

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  13. N

    Ideal standard push button broke dual flush

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  14. Z

    Thos Dudley Niagara Dual Flush

    I have a concealed cistern in our main bathroom which I have identified as a Thomas Dudley Niagara unit. Its a dual flush pneumatic. For some time the long flush has not been working and it can take several short flushes to clear the WC. I have checked what I can. I removed the tubes from...
  15. P

    Pneumatic dual flush concealed cistern

    Hi, just considering replacing toilet with one of these concealed system. Never heard of these pneumatic systems. In your WIDE experience can anyone say if they work and are reliable. Many thanks in advance.
  16. T

    Dual flush valves - what principle do they operate on?

    Hi I want to know what principle/ mechanism dual flush toilet valves use to flush. i.e. what is actually happening when you press the button and how does it control a short flush or a full flush. I know how the siphons in older style toilets work, but there seems to be more and more of the...
  17. T

    New Opella Dual Flush fitted last Nov - now only short flush works!!

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  18. E

    Problem with Dual Flush Toilet

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  19. W

    Ideal Standard Dual flush cistern

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  20. G

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    My 3 year old basic model RAK Ceramics dual-flush close-coupled unit sometimes has a delay before refilling. The pause before refilling (short and long flush) can last up to 10 seconds before the water inflow starts the refill. Has anyone any idea how to remedy this re-filling delay? This is a...
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