Abstract: An apparatus for collecting, disinfecting and disposing of body waste materials accumulated from a patient including a pair of adjacent collection chambers each having an upper and a lower end, the upper and lower ends respectively being substantially at the same elevations, a first conduit connecting the lower ends of the collection chambers for communication therebetween, a set of conduits connecting the upper ends of the collection chambers, the set of conduits having a smaller cross-sectional flow capacity than the first conduit, an inlet to the first collection chamber at an intermediate location thereon, and an outlet connected to the second collection chamber at an intermediate location thereon, an inlet conduit having a first end for connection to the inlet to the first collection chamber and an opposite open end for exposing to the waste materials to be collected and a conduit for connection to a predetermined environment to establish the environment in the chamber.