| 摘要 |
PROBLEM TO BE SOLVED: To provide a toilet bowl device which maintains the conventional quantity of water, with which a water closet is flushed, and which enables a reduction in total capacity of a water tank, a drain pipe, etc. SOLUTION: The toilet bowl device 10, which is provided with a drain valve 16 on a side of a water supply port 15 of the water closet 11, has a drain inlet 13 of the water tank 12 for storing the water, with which the water closet 11 is flushed in use, and the water-tank drain pipe 14 to which the port 15 is connected.
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