Abstract: A liquid waste disposal unit for use in a hospital to handle potentially contaminated waste materials or the like is disclosed. The disposal unit has a funnel shaped wet bottom chamber connected to a trap section. A rinse means for a container extends up inside it and a vent is provided for removing airborne odors, aerosols, fumes and air. The chamber may be connected to a grinder located between the chamber and a trap. The trap may discharge into a centralized treatment tank. An unobstructed connection is provided between the chamber and the trap and an integral outlet fitting is connected to the chamber between the trap and the chamber for connecting to a building waste line. A foot lever controlled door is hinged to the top of the chamber. A "spin" type nozzle and a flushing mechanism are interconnected with the door and provides a gentle flush when the door is opened. Rim nozzles are arranged so that water encircles the inside of the bowl in a spiral path toward the bottom.