| 摘要 |
PROBLEM TO BE SOLVED: To flush a toilet by setting the amount of water for use in urine flushing to a required minimum constant value, while maintaining required flushing pressure. SOLUTION: A main tank 1 of the flush toilet has a sub-tank 7 installed therein, and a water supply valve 10 and a sub-float valve 9 are attached to a bottom of the sub-tank 7. Further, a water discharging side of the sub-float valve 9 communicates with a water discharging side of a main float valve 6.
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