A wash-down toilet including a bowl, a passageway, and a trapway. The bowl includes a sump. The passageway includes an inlet in fluid communication with the sump, an outlet provided at a height above the inlet, and a weir. The trapway includes an inlet, an outlet, and a vent, with the inlet of the trapway being in fluid communication with the outlet of the passageway and the outlet being in fluid communication with a soil pipe. The vent is configured to introduce a supply of air into the trapway during a flush cycle to prevent siphoning.