WATER ROTATION TYPE DRAIN PIPE

摘要

PURPOSE: A water rotation type drain pipe is provided to lower the water pressure in the pipe, and to reduce drain noise by smoothly introducing air into the center of the pipe. CONSTITUTION: A water rotation type drain pipe(P) is made of polyvinyl chloride. A plurality of fluid guiding protrusions(1) are formed at the inner surface of the drain pipe, and formed with 0.5-5 counterclockwise rotations per 50 centimeters repeatedly. A spiral fluid passage(2) is formed between the fluid guiding protrusions. The section of the fluid guiding protrusions has a triangular shape.