| 摘要 |
PURPOSE: A drainpipe assemblage is provided to easily correct caused by wrong construction and to prevent noise and stink by mounted on a roof or a veranda. CONSTITUTION: A main drain tub(100) and a sub drain tub(200) are installed on concrete(300) expose upper and lower faces to drain rainwater dropping from a roof with wastewater of each floor. A hopper(150) of a hollow mounted in the main drain tub contains plural slant wings(152) to form vortex by the rainwater or wastewater drained through a large diameter drainpipe(120) of an upper floor in an inner circumference face of the hopper. The sub drain tub forms a discharge hole(201) connected to an engage hole(103) on a side face and an inlet hole(202) flowing in the wastewater on the other side. A drainpipe assemblage discharges the wastewater or rainwater by dividing small diameter drainpipes(121,111) and large diameter drainpipes(110,120) to reduce noise.
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