Product introduction: Plastic inspection wells, commonly known as “manholes”, are generally located at drainage pipe intersections, turns, pipe diameter or slope changes, water falls, and straight pipe sections at a certain distance. They are necessary drainage ancillary structures that facilitate regular inspection, cleaning and dredging of pipes. The plastic inspection well is composed of well seat, well shaft, manhole cover and other accessories, the pavement load acts on the periphery of the inspection well through the manhole cover and the well seat, so as to avoid the damage of the pavement load to the inspection well. Plastic inspection wells are increasingly favored by urban and residential construction due to their advantages of corrosion resistance, aging resistance, convenient construction, energy saving, environmental protection and safety, etc., and are widely used in municipal roads, construction communities and other fields.