1. IN A SELF-CONTAINED POWER OPERATED SEWERAGE SYSTEM, THE COMBINATION OF AN ENCLOSED TANK HAVING AN APERTURE FORMED IN THE TOP THEREOF, A FLUSH BOWL HAVING A LOWER PERIPHERY WHICH DEFINES A HORIZONTAL DISCHARGE OUTLET, AN ANNULAR FLANGE MEMBER HAVING A DOWNWARDLY EXTENDING PORTION WHICH PROJECTS THROUGH SAID APERTURE AND RECEIVES SAID LOWER PERIPHERY OF SAID FLUSH BOWL, A HORIZONTALLY EXTENDING PORTION ON SAID FLANGE MEMBER FOR ENGAGING THE PERIPHERY OF SAID APERTURE TO SUPPORT SAID BOWL ON SAID TANK ABOVE SAID APERTURE, SEAL MEANS INTERPOSED BETWEEN SAID FLANGE AND SAID TOP AROUND THE PERIPHERY OF SAID APERTURE FOR BLOCKING FLUID FLOW FROM SAID TANK BETWEEN SAID FLANGE AND TOP, A DISCHARGE SPOUT HORIZONTALLY PIVOTALLY MOUNTED ON SAID FLANGE AND HAVING A HORIZONTAL INLET OPENING ALIGNED WITH SAID DISCHARGE OUTLET FOR RECEIVING FLOW THEREFROM, SAID SPOUT BEING REMOVABLE BETWEEN A NORMAL POSITION IN COMMUNICATION WITH SAID OUTLET AND EXTENDING LATERALLY WITH RESPECT TO THE AXIS OF SAID DISCHARGE OUTLET TO DIRECT ALL WASTE MATERIAL FLUSHED WITH SAID BOWL INTO SAID TANK AND AN INACTIVE POSITION WHEREIN SAID SPOUT IS SPACED