| 摘要 |
PURPOSE: A sleeve for a wastewater drain pipe is provided to reduce noise without requiring a separate soundproofing member when discharging wastewater. CONSTITUTION: A sleeve for a wastewater drain pipe comprises a pipe fixing housing(110) and a height control housing(120). A wastewater drain pipe is inserted into the pipe fixing housing and a first fixed protrusion(112), which is adjacent to the wastewater drain pipe, is formed on the inner surface of the pipe fixing housing. The height control housing is detachably coupled to the top of the pipe fixing housing and a second fixed protrusion(122), which is adjacent to the wastewater drain pipe, is formed on the inner surface of the height control housing. The first and second fixed protrusions have the same inner diameter and the same axis. |
