The present invention relates to a sewer pipe watering system, which is constructed such that a sewerage line is divided into sections and installed in a sewer line of a sewage box, A plurality of shutoff devices for shutting off sewage; And a plurality of detour devices installed in the gutter ducts of the sewage box by interconnecting the cutoff devices and bypassing the wastewater cut off from the cutoff devices to different sections.;
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