A plastic water storage tank is a water-storage container made of plastic. It is used to store and transport water both indoors and outdoors. Plastic tanks are lightweight and durable, making them easy to move and install. They are also non-corrosive, which means they do not rust or corrode and last longer than metaltanks. Plastic water storage tanks come in a variety of sizes and shapes and can be used for a variety of purposes, including rainwater harvesting, water storage for emergency preparedness, and agricultural use.