The composite hatch is half as cheap as the cast iron hatch, but it has the same features and many advantages over competing hatches. It is made of composite material, is light and very resistant to mechanical damage, UV radiation and water. The rough surface and shape make the hatch safe for pedestrians and does not slip. It is lockable with two Allen screws, which guarantees safety for people and animals. The construction of the hatch is such that it allows installation in a plane with the ground surface, thanks to which the hatch does not interfere with pedestrians and does not disturb the aesthetics of the lawn or sidewalk. The dimensions of the cover are such that it can be easily installed on any Kolomaki tank or shaft, or on most other plastic and concrete tanks.