An underground water tank cover protects the tank from debris, excess moisture, rain, snow, sleet, and hail. It also keeps contaminants out, prevents evaporation, and reduces the risk of health and safety issues. These coverings are composed of various materials, including composite materials, steel, and cast iron, and they are available in a variety of sizes and shapes. The Underground Water Tank Covers made of FRP has an extra edge over cast iron, ductile iron, and RCC. FRP Underground Water Tank Covers are a great option for outdoor installations because they are corrosion-resistant, lightweight, and strong. Furthermore, they can be made to precisely match the size and shape of the tank and are simple to install and maintain. Making sure an FRP Undeground tank cover is made to fit the specific model and size of the tank is crucial. In order to stop pollutants from getting inside the tank, this will guarantee that the cover fits snugly and securely. Additionally, since exposure to sunlight can cause the cover to deteriorate over time, it is imperative to select a UV-resistant cover.