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Learn why your water heater makes knocking or popping sounds. Discover how Riverview hard water causes sediment buildup and how to fix it fast.

March 13, 2026

Why Is My Water Heater Making a Knocking Sound?

A knocking or popping sound in your water heater is caused by sediment buildup at the bottom of the tank. In Riverview, hard water minerals like calcium and magnesium settle and harden. When the burner turns on, steam bubbles get trapped under this layer and “pop” as they escape. This creates the loud thumping noise […]

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