While manhole covers are technically access covers, not all access covers are manhole covers. There are different standards you must adhere to depending on where you use them.
In addition to durability, cast iron gully grids also provide an aesthetic appeal. They can be designed in various styles, including traditional and modern patterns, which allows them to blend seamlessly with the urban landscape. Local municipalities often prioritize the visual aspect of drainage systems to maintain the beauty of their cities, making cast iron an attractive choice for gully grids.
gully grid cast iron

Manhole covers also serve the purpose of keeping unauthorized personnel from accessing manholes and, in turn, keep sewer or stormwater systems safe. Manhole covers also function as a source of ventilation to prevent sewer or stormwater gases from entering residences and as an easy entry point for maintenance workers to access sewage and stormwater lines.