Yellow Polyethylene Manhole Kian Sanat Pasargard

Older manholes often had stairs for easy access to the interior, but over time the manholes were designed to be smaller and smaller in size so that physical entry was not required. The relevant standards. But the most important development in the field of manholes, especially in sewage manholes, has been made of polymeric materials, especially polyethylene, which can be reliably used due to the complete sealing of the network and the lack of penetration of sewage and groundwater and vice versa in a variety of wastewater projects. One of the most important parts of the sewage system is because it eliminates the need for drilling. The municipal and domestic sewer system uses a manhole to connect several sewer pipelines to one sewer. Safety equipment required to prevent accidents from falling and harmful gases such as methane and hydrogen sulfide.
Sewer manholes are used in municipal sewage and industrial wastewater systems, as well as in various applications in the oil, gas, petrochemical and power plants and urban transmission lines.