Polyethylene manhole or Admiro (PE) is a pit that connects ground to underground facilities (such as sewage networks, telecommunication cables for industrial sewage systems, etc.) and allows access to the facility for any kind of Operation is possible. This pit should be large enough to allow the movement of a human within it. The most important use of manholes is the creation of access points to various points of collection and sewage networks, which provides for the inspection of lines, natura ...