A-24 Study of the Drainage Performance Improvement Technique of Drainage Stack System by means of Air Admittance Valves : Part3. An application of the Single Air Admittance Valves to the horizontal fixture drain branch

Abstract

This report propose a prediction method for drainage performance, which use the evaluation indices acquired by measuring a pipe pressure variation and an air flow rate when air-admittance valves are installed in a locations along the horizontal fixture drain branch of a drainage stack system. And examines how the change of the negative pressure value and the positive pressure value of pipe pressure affects the drainage performance.