Electric water heaters typically last 10 to 15 years with proper maintenance. They generally outlast gas models because they have fewer components and no combustion-related wear. Factors shortening lifespan include hard water sediment buildup and lack of maintenance. Replace the anode rod every 3 to 5 years to prevent tank corrosion. Flush sediment annually. Signs of failure include rusty water leaks reduced hot water and strange noises. Check your warranty as many electric models have 6 to 12 year coverage.