An overhead tank is a large container typically placed on rooftops or elevated structures to store water. It's commonly used in buildings, homes, and industries to ensure a steady supply of water for various purposes like drinking, cooking, cleaning, and firefighting. These tanks can vary in size, material (such as plastic, concrete, or metal), and shape (cylindrical or rectangular). They are usually connected to a water source like municipal supply or wells and equipped with outlets for distribution through pipelines.