Abstract
The present study is aimed to propose the establishment of the plan of the drainage and vent system of the low-rise house and the design method and testing method of flow capacity. It is necessary to attempt the accumulation of the test data that shows a necessary drainage performance to propose the examination method. A concrete research method is as follows. 1) The condition at the edge of the stack vent pipe where it influences the flow capacity for drainage system most is presented. 2) The drainage system influence on the drain load condition is understood. It reports on the result of experimenting on these examining it.
