Water Heater Making Noise? Here's What Each Sound Means
Meta description: Popping, rumbling, or hissing water heater? A licensed plumber explains what each sound means, what's safe to ignore, and when to call for help.
A noisy water heater is your home trying to tell you something. Here's how to translate the popping and rumbling before it turns into a flood.
Popping or rumbling: sediment buildup
The most common culprit is sediment hardening at the bottom of the tank. Water gets trapped underneath and 'pops' as it boils through. A flush usually fixes it — and extends the life of the unit by years.
Hissing or sizzling: a possible leak
Hissing can mean water is hitting the burner or escaping from the tank. This one isn't a wait-and-see — shut off the unit and call a plumber, because a failing tank can leak fast.
Ticking or tapping: usually harmless
Light ticking is often just pipes expanding and contracting as water temperature changes. If it's not paired with leaks or pressure changes, it's typically nothing to worry about.
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