| 摘要 |
PURPOSE: A connection pipe is provided to easily perform the connection work of the connection pipe, and to keep the watertightness of connected parts by improving the structure of the connected parts. CONSTITUTION: Connection pipes(1,11) are composed of a body unit, a first flange unit(23) integrally formed at one side of the body unit, and a second flange unit(33) integrally formed at the other side of the body unit. The first flange unit has a flat surface(39) contacted with a watertight member, and a coupling groove(37) coupled with the second flange unit. A plurality of cut units are formed at the end of the first flange unit. The second flange unit has a protrusion(35) coupled with the coupling groove. An extended unit(36) is extended from the protrusion. The watertight member is fit between the extended unit and the flat surface when the protrusion is coupled with the coupling groove.
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