PIPE JOINT FOR VENT PIPE CONNECTION

摘要

PROBLEM TO BE SOLVED: To provide a pipe joint for vent pipe connection with back-flow preventing function, which has an extremely compact joint structure between a main pipe part and a branch pipe part of the pipe joint.

SOLUTION: The pipe joint for vent pipe connection comprises the main pipe part including an upstream drain pipe connecting port and a downstream drain pipe connection port at both ends, and the branch pipe part including a vent pipe connection port extending on a plane orthogonal to the pipe axis of the main pipe part in parallel to the plane and fluid-connected with the main pipe part. The inside diameter of the branch pipe part ranges from 40% to 90% of the inside diameter of the main pipe part, and the inner pipe bottom of the branch pipe part is horizontally extended outward from the inner wall surface of the main pipe part in a height position of 60% or more of the inside diameter of the main pipe part.

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