The 18 meter pipe water efficiency test is mainly used for testing the drainage and conveying characteristics of toilets, and for testing the drainage and conveying performance of sanitary ware and other products. The experimental equipment is assembled with aluminum profiles and uses 18M transparent pipes arranged in groups of 3M. The test delivery pipe is designed according to relevant standards and installed below the workbench. The test sample is installed on the surface of the workbench. During the test, the sample is observed by flushing the plastic ball and the relevant test results are recorded. Based on the test results, corresponding data such as average transmission distance and weighted transmission distance can be obtained