抄録
This study is to evaluate the performance of domestic combined drain systems and to propose a new central drainage system in detached houses. First, experiments of new system were carried out to compare the drainage performance with the conventional domestic combined drain system using general fittings, and it was confirmed that new system is superior to conventional system in respect with the three unit simultaneous drainage experiment. Moreover, on new system, experiments using model piping system of detached houses were carried out, and the features of this system was obtained.