Why does my water heater make popping sounds?

Popping sounds from a water heater are caused by sediment buildup at the bottom of the tank. As the burner heats the water, trapped sediment creates steam bubbles that rise through the sediment layer and pop. This means your water heater needs to be flushed. Attach a garden hose to the drain valve, run it to a floor drain or outside, and flush the tank until the water runs clear. Annual flushing prevents sediment buildup, reduces noise, and extends your water heater's lifespan.