V-Guard is able to provide such generous warranties because every component of the water heater is made with high-quality and durability-enhancing materials. Take the inner tank - its steel body is glass-lined to prevent corrosion, ensuring a very long life. Meanwhile, it has a long-lasting plastic end cover and an outer cover made of galvanized iron which is known to be excellent at preventing corrosion. Further, a sacrificial anode also helps to keep corrosion at bay. View Detailed Description