The magnesium water heater anode rod protects your water tank better than the classic aluminum zinc rod.<br> Replacing the anode rod in a water heater before it fails can slow down corrosion inside the tank and significantly extend the life of the water heater.<br><br> At Powerworks, we extremely value your complete satisfaction and strive to provide high quality products with enthusiastic service.<br> If you are not satisfied with the product or just have a question, please do not hesitate to contact us.We promise to give you a 100% satisfactory solution.