Manholes are designed for easy maintenance of urban underground infrastructure, including power supply, water supply, drainage, sewage, communication, cable TV, gas pipelines, and streetlight lines. They are typically located at pipe intersections, bends, changes in pipe diameter or slope, and at regular intervals along straight pipe sections, facilitating periodic inspections of auxiliary structures.
Manhole installation  Beneficial at pipe intersections and bends for convenient regular inspection of auxiliary structures in residential and commercial complexes
Manholes are used within residential areas, public building zones, industrial areas, etc., for plastic drainage pipelines buried underground with an outer diameter not exceeding 800mm and a burial depth not exceeding 6m, typically installed at junctions, bends, pipe diameters, or slopes of the drainage pipelines.