Hot Water Heater "Pops"

Old 03-19-06, 03:43 PM
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Hot Water Heater "Pops"

We have a 12 year old gas water heater that periodically makes popping noises. Is this just the sound of water heating up inside the tank or is there a problem? The water heater in drained at least once a year to remove sludge from the bottom of the tank.
Thanks for the feedback,
Old 03-19-06, 04:16 PM
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Popping usually indicates mineral deposits laying on the bottom of the tank. The heat has to go through them to heat the water and actually "boils" the deposits. This is what causes the popping. You said the tank is usually drained once a year. Did you mean drained AND flushed or just drained? If you just drain it, the deposits (or a lot of them) will just stick to the bottom of the tank. You should drain the tank, turn the water supply back on (with the drain hose connected) and let it run a few minutes and then drain again. Look at the end of the hose to see if deposits are still coming out.
Old 03-19-06, 07:13 PM
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At 12 years old, you might also change the anode rod. Purchase a new rod for your water heater, turn off water and gas, drain off a few gallons of water and remove the old rod from the top. Install the new one as the old one was and turn everything back on.

The anode rod helps slow down rust in the tank. Rust may be part of your noise problem or may have nothing to do with it, but this should be done every few years (4 or 5).

Doug M.

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