Water Heater Making Noise? What Popping, Rumbling & Hissing Mean

By Top Florida Plumbers · Updated 2026-11-08

Water heaters shouldn't be noisy. Each sound points to a specific problem – some minor, some urgent.

Decode the sound

• Popping or rumbling – sediment on the tank bottom traps water that boils and bursts through. A flush usually fixes it; ignored, it burns out elements and cracks tanks.
• Hissing or sizzling – water dripping onto a hot burner or element; the tank or a fitting may be leaking.
• Screeching or whistling – a partially closed inlet valve or a failing T&P relief valve.
• Ticking – pipes expanding and contracting; harmless but can be quieted with straps.
• Banging when water shuts off – water hammer; a hammer arrestor fixes it.

When to call

Hissing, leaking or a T&P valve that discharges water are urgent. Any heater over ten years old making new noises should be inspected. Florida's hard water makes annual flushing worthwhile – we can do it as part of a water heater repair visit.

Water Heater Repair Near You

We provide water heater repair in every Florida city, including Apopka, Boca Raton, Bonita Springs, Boynton Beach, Bradenton, Cape Coral, Clearwater, Coconut Creek, Daytona Beach, Deerfield Beach, Delray Beach, Deltona and many more.

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