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The Differences and Functional Analysis Between Sewer Pipes and Ground Drainage Pipes

2026-06-08

Understanding Urban Drainage: Sewer vs. Ground Pipes

Sewer pipes and ground drainage pipes may seem similar, but they are actually two crucial facilities in the urban drainage system and the core of the rainwater and sewage separation project.

Ground Drainage Pipes

The ground drainage pipe, as we often refer to it, is mainly responsible for collecting surface water, roof rainwater, and melted snow water. These pipes are laid relatively shallowly and have a larger diameter, specifically designed to handle sudden large water volumes during heavy rainstorms. They drain water quickly. The water quality is clean and does not require purification treatment, and it can be directly discharged into rivers and lakes. Their main function is to quickly drain the accumulated water and prevent urban flooding.

Sewer Pipes

On the other hand, sewer pipes are specifically designed to collect domestic kitchen and bathroom wastewater as well as daily production wastewater. The water body contains impurities, oil, and bacteria, making it highly polluted. The pipes are buried deeper and have better sealing properties. They are equipped with a reasonable slope to prevent silt accumulation and blockage. The wastewater is uniformly transported to the sewage treatment plant, where it is purified to meet standards before being discharged or reused.

These two types of pipes operate separately, which can enhance the efficiency of urban drainage and reduce the risk of flooding.

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