Our Polyethylene Manhole (alternatively called inspection chamber, utility hole, cable chamber, maintenance hole, access chamber, sewer hole or conned space) is the top opening to an underground utility vault used to house an access point for making connections, inspection, valve adjustments or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains and other services. Our polyethylene manhole will also contribute to the protection of the environment and your absorption pit.