| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rainwater pipe structure can prevent rainwater from a rainwater flow passage from reversely flowing by a reverse flow check valve and of relatively facilitate a maintenance operation for the reverse flow check valve. Ž<P>SOLUTION: This rainwater drain pipe structure 100 includes an auxiliary gully 22 which is buried in a ground and in which an inspection hole 22 opening to the ground is formed, a pipe 105 which connects the auxiliary gully 22 to a gutter 102 outside a house and which is buried in the ground, and the reverse flow check valve 10 so disposed in the auxiliary gully 22 as to be at least partly positioned under the inspection hole 22d. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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