1, building drainage system classification: domestic sewage pipe, production sewage (wastewater) pipe, rainwater pipe.
2. Three kinds of sewage is the use of diversion or combined sewage, depending on the nature of the sewage, outdoor drainage system set up and sewage utilization and treatment of this situation.
3. In order to dredge the drainage pipe, in the indoor drainage system need to set up three kinds of clearing equipment: inspection port, cleaning port, inspection well.
4. Inspection port: located in the drainage riser and the longer horizontal pipe section, with a short bolt cover, clearing the cover will be opened. The installation of the provisions of the riser in addition to the highest and lowest level of the building must be set up, can be set up every 2 layers, if the 2-storey building, can be set up on the ground floor. Inspection port is generally set at a height of 1m from the ground, and higher than the upper edge of the floor sanitary ware 0.15m.
5. External drainage system: gutter drainage, long gutter drainage
6. Internal drainage system components: rain bucket, suspended pipe, standpipes (along the walls or columns of the open installation), the underground rain gutter pipe and clear through.
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