1, save resources and protect the land: the use of polymer resin as raw materials, instead of traditional brick, masonry cement well as raw materials, reduce the consumption of energy and farmland, saving valuable clay resources; 2, environmental protection, and efficient drainage : each nozzle connections are made of a flexible connection, good sealing performance, the complete elimination of rain water seepage, leakage, prevent secondary pollution of groundwater. The smooth wall, low roughness coefficient, strong performance through the water, drain efficiency is about twice that of conventional manhole; 3, easy transportation and installation: injection-well, well base and wellbore isolation, site assembly, you can save shipping costs ; but also shorten the construction period, the construction period is 1/10 of the traditional inspection wells; 4, durable: anti-aging of polymer materials, resistant to degradation of characteristics determine the product's long life; my company's unique Manhole stiffener designed to increase the body well and soil friction, achieve the anti-settling and anti-floating uneven results; 5, anti-leakage: the overall well a molding, hot-melt and flexible support base between manholes and drainage pipe plug connection, uneven settlement of pipe base material and withstand strong ability to adapt to thermal expansion and contraction, which can effectively prevent leakage;