Various types of sewer manhole covers are used for different locations. Sewer manhole covers serve a simple purpose and are almost universally applicable. From household sewer covers in kitchens and bathrooms to large city sewer manhole covers, any place where water drainage occurs through pipes will require a manhole cover. Sewer manhole covers come in different types that are placed at the end of pipes or large sewage manholes. These covers are often movable and are constructed in two types: mesh and closed. Mesh covers are used for the passage of water without solid materials, effectively preventing pipe blockages. Closed covers are used to prevent the release of foul sewage odors. In large city sewage manholes, manhole covers are used to prevent people or animals from falling into the sewage.
Types of Sewer Manhole Covers
In general, Ista Polymer Sharif categorizes sewer manhole covers into access covers and manhole covers. Access covers can be made of metal or plastic, though nowadays these are mostly made of plastic, composite, or nano-composite materials. Manhole covers can be made of cast iron, concrete, polymer concrete, polyethylene, or composite materials.
Access Covers
In the past, access covers were made of metal, but they have been replaced by composite manhole covers. Plastic sewer covers also have significant applications, but composite covers offer advantages such as high resistance, lightweight, and rust resistance. As mentioned above, access covers prevent the entry of animals or solid materials into the sewer while allowing the flow of water.
City Sewer Manhole Covers
In the past, city sewer manhole covers were made of concrete. These covers were heavy, making them difficult to move, which often led to workers leaving them uncovered and causing accidents. Unfortunately, many people lost their lives due to falling into sewer manholes. Another drawback of concrete sewer manhole covers is their susceptibility to breaking and cracking due to freezing and cold weather conditions.
Over time, cast iron manhole covers replaced concrete ones. These covers were lighter and more resistant. However, due to the relatively high price of cast iron and its ease of recycling, they were frequently stolen by thieves. Consequently, production of cast iron manhole covers was stopped, and theft-resistant covers were introduced.
Composite sewer covers are lightweight and resistant to impact and pressure. They also have an attractive appearance and good resistance to various weather conditions, making them suitable for use in humid and mountainous areas. They have a longer lifespan compared to cast iron and concrete samples.
Price of Plastic Sewer Manhole Covers
Polyethylene manhole covers, often referred to as plastic covers, are produced in traffic and non-traffic forms at Ista Polymer Sharif. These covers come in various classifications, allowing customers to choose covers according to their desired pressure tolerance.
Iranian company Ista Polymer Sharif is active in consulting, designing, manufacturing, and installing various composite tanks, pipes, fittings, waterproof coatings (for ceilings, floors, and walls), paints, ceramics, tiles, and more. For information on their services, inquiries about the price of plastic sewer manhole covers, or to purchase these covers, you can contact the consultants of this company.
