| 摘要 |
An odor prevention valve is provided to improve the residential environment by preventing a bad smell and backflow and to be used to a drain pipe of a basin manufactured in a small size by using nonferrous metals. In an odor prevention valve for preventing backflow odor from sewage by connecting a combination body mold in a manufacturing method of a PVC synthetic resin mold to a conventional PVC pipe, the odor prevention valve extends a range of an approval angle by determining an angle of elbow as about 120 degrees and all angles of outlet surfaces as about 45 degrees and prevents water flow from being disturbed by a lightweight blocking plate. |
