Water Heater Making Noise? What It Means
Popping, rumbling, ticking, or banging — here's what each sound is usually telling you.
Popping, rumbling, ticking, or banging — here's what each sound is usually telling you.
A water heater that's suddenly noisy isn't always failing, but it is always trying to tell you something. Here's how to read the most common sounds.
By far the most common noise, and almost always sediment buildup at the bottom of the tank. As water heats underneath the layer of sediment, steam bubbles form and pop as they push through, which is common with Torrance's harder water. A professional tank flush clears it and restores efficiency.
Usually just the metal tank and pipes expanding and contracting as they heat up and cool down — normal and not a concern on its own, especially right after installation.
Often "water hammer" from a valve closing quickly elsewhere in the house, not the water heater itself, though it can also point to loose pipe straps. If it happens every time a specific fixture shuts off, that fixture's valve is the likely source.
This can mean a partially closed shutoff valve restricting flow, or in some cases a failing pressure relief valve. Worth having checked promptly rather than waiting, since it can point to excess pressure in the tank.
Occasional ticking is fine to ignore. Ongoing popping, any banging that's new, or a whine from the relief valve are all worth a look — see our water heater repair page for what a service visit covers.
Most water heater noise in Torrance traces back to sediment and hard water. A routine flush handles it before it turns into reduced efficiency or a shorter tank lifespan.
Reviewed by the Rush Plumber team — licensed, insured plumbers serving Torrance, CA and the South Bay, 3610 Torrance Blvd, Torrance, CA 90503. Call (209) 860-5004, 24/7.
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