Yes, you still need to flush your water heater annually even if you have a water softener. While a water softener successfully eliminates new hard water mineral scale from coating your plumbing and heating elements, existing sediment, silt, and dust entering through municipal lines or well systems can still settle at the bottom of the water heater tank over time. Additionally, if your water softener was installed after your water heater ran hard for years, old limescale inside the tank can continue to break down, requiring a thorough flush to maintain heating efficiency. Verification: Drain a few gallons from your water heater tank annually to check for accumulated sediment.
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