| 摘要 |
PROBLEM TO BE SOLVED: To provide a urinal capable of suppressing the formation of urinary stones in a horizontal drain branch pipe while securing water saving performance.SOLUTION: A urinal US executes a first washing mode in which urine residing in at least a trap part can be displaced by washing water, stops water supply for a predetermined time after executing the first washing mode, and executes a second washing mode in which the water supply is restarted to supply washing water Wf after Ur1 as at least part of drainage including the urine displaced by the washing water supplied in the first washing mode flows to the further downstream side than a connection part where a fixture drain pipe 50 is joined to a horizontal drain branch pipe 51. |
