Evaluation of water-efficient toilet technologies to carry waste in drainlines, a Canada Mortgage and Housing Corporation project

DISCLAIMERS Every effort was made to ensure the accuracy of the testing program and the presentation of the project results contained in this report. [...] The 6-L pressure-assisted model achieved the highest ranking with carry distances approximately 130% of the average distance, whereas the washdown and vacuum-assisted models had carry distances of less than 80% of the average. [...] Carry distance appears to be more affected by the slope and diameter of the drain pipe than the velocity of the waste as it enters the drain. [...] Note that the top right photo shows 200g of media (the mass of media used in testing) and four balls of toilet paper, and the bottom right photo shows the two levels of the test rig – the lower level was used to test the minimum drop height and the upper level was used to test the maximum drop height. [...] Measurements identified in this study are based on the centre of mass of the deposited media, i.e., the technician noted the leading and trailing edge of the waste plug and visually assessed the position of the center of mass.