DRAIN STRUCTURE OF DRAIN PIPE LINE

摘要

PROBLEM TO BE SOLVED: To provide a drain structure of a drain pipe line capable of preventing it from being clogged with waste water and being made inexpensive and compact. SOLUTION: The drain structure of the drain pipe line is connected to a drain hole in such a manner as to face the drain hole from below, and has a curved pipe portion facing the drain hole from below. An air reservoir space serving as an air vent in the drain pipe line is formed on the back of the wall face of the vertical pipe portion of the drain pipe line extending from the drain hole to the curved pipe portion, at least in the curving direction of the curved pipe portion.