It is quite common to see stones and bricks on water tanks fearing that the lid would fly away. It is not needed anymore since modern tanks have new technology.

They come with threaded lid to close the water tank. They also have have locking system. When you use that, tank cover will be tight. Water tank cover will not fly away even during a cyclone 🙂. Your drinking water will be safe.

Popular tanks with this technology are Supreme Water Tank, Ashirvad Water Tank and Astral Water Tank. It is important to get these tanks with bill and warranty as these come with 7 to 10 years warranty.

So don't worry about your water tank cover anymore. Have a safe water.