Abstract: A water closet including a body portion with an upper level and a lower level, and integral with the body portion, a closet bowl and an outlet conduit forming an odor seal at the bottom of the bowl. The odor seal has an outlet crest determining its highest water level. There is a flush water container adjacent to the body portion and means for flushing the closet bowl with water passing by gravity from the flush water container through the bowl and the outlet conduit. Further, the odor seal outlet crest is at a height level of at least 50 percent of the height of the upper level of the body portion measured from the lower level thereof, and close to the upper level there is an annular flush duct of substantially bottomless configuration opening into the bowl at a level above the odor seal outlet crest, and, in addition, the outlet conduit has a constriction at its outlet end.