抄録
The purpose of this study is to evaluate drainage performance and obtain fundamental planning data for drainage systems of low-rise detached houses. In this paper, we grasped characteristic of air resistance of vent caps for standard stack vent pipes, and clarified effect of drainage load on drainage performance at first. Next, the recovery efficacy of drainage performance was quantitatively obtained by employing the support vent device (using small air admittance valve [AAV]) installed on the fixture drain pipe. The device is used when an excessive air resistance exists in single stack system where the drainage performance will be hindered.
