Try one or more of the following methods. You’ll help your water heater last longer. Scheduled Tune Ups: Regular tune ups help your water heater work more efficiently and last longer. A trained technician is also more likely to spot warning signs that your water heater might be about to fail. Scale Inhibitor or Water Softener: If you live in an area with hard water, limescale mineral deposits can harm both conventional and tankless water heaters. Use a scale-inhibiting filter to protect your water heater and help it last longer. Alternatively, install a whole-house water softener. Flushing: Drain (“flush”) your hot water heater tank every 6 – 12 months to clear out sediment buildup. While this can be a DIY home maintenance task, if you are unsure of what you’re doing or the tank is being drained for the first time in years, you may want to call a professional. Anode Replacement: The anode, a metal rod inside your water heater, attracts ions and minerals which would otherwise corrode the tank. After 2 – 3 years, have the anode checked annually and replaced when it deteriorates. Help your tank last longer; for additional protection, install a second anode rod.