Water Heater Anodes. Water heater anode rods protect water heaters through the process of electrolysis where a sacrificial anode is depleted to prevent corrosion of exposed steel in the water heater..Contact A. O. Smith through our online contact us form..To send us an e mail, please select the following links that best applies to your questions request. We will respond as soon as possible. Technical Support Product questions, technical support, and service needs questions..Replacement parts and kits are available at Get the right part every time with our online lookup tool. Quick shipping most parts ship within one business day..