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Why does my hot water sometimes sound like popcorn?

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Posts: 7
(@sports351)
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Popcorn noise is classic sediment buildup. I’ve lost count of how many tanks I’ve drained where the water looked like muddy soup. “Self-cleaning” is just a buzzword—if you don’t flush it, that stuff’s gonna rattle around and make a racket. I’m not convinced water softeners do much for this, honestly. Regular maintenance is the only thing that actually works in my experience.


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Posts: 15
(@skater64)
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- That “self-cleaning” label always seemed a bit optimistic to me too.
- I flushed my tank for the first time last month and the water was way nastier than I expected—definitely not something I’d want rattling around in there.
-

“I’m not convinced water softeners do much for this, honestly.”

I was actually wondering about that. We have a softener, but I still get the popcorn noise sometimes. Is it possible the type of sediment matters, or is it just a matter of time before any tank gets gunked up?
- Anyone tried those powered anode rods? Curious if they help with buildup or just extend tank life.


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apollofoodie9735
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(@apollofoodie9735)
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I’ve always been a bit skeptical about the “self-cleaning” claim too. Had a place with one of those tanks—still ended up with the same gritty mess at the bottom after a couple years. Flushing it was like draining a mud puddle.

About the water softener thing, I’m not totally convinced they make much difference for sediment either.

“I’m not convinced water softeners do much for this, honestly.”
I’ve got softeners in a few rentals, and I still hear that popcorn sound from time to time. My guess is it’s more about what’s in your local water supply than whether it’s hard or soft. Some areas just seem to have more junk floating around.

As for powered anode rods, I tried one once after reading all the hype. Didn’t notice less sediment, but the tank lasted longer before rusting out. Maybe it helps with corrosion more than buildup? Hard to say without cutting one open, which I’m not about to do unless it’s already shot.


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Posts: 4
(@snorkeler393044)
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That popcorn noise drives me nuts too. I’ve torn apart enough heaters to see what’s going on—honestly, most of the time it’s just sediment cooking on the bottom. Doesn’t matter if you’ve got a softener or not, if your water’s got junk in it, it’ll settle out eventually. Softener mostly deals with calcium and magnesium, not the sand or grit that causes those popping sounds.

Self-cleaning? I’ll believe it when I see a tank that actually stays clean for more than a year or two. Marketing loves to throw that term around, but in practice, I see just as much crud in those as any other tank. Maybe the powered anode rods help with rust and corrosion, but they’re not magic for sediment either.

Honestly, regular flushing is about all you can do unless you want to get into whole-house filtration (which costs real money). Even then, some stuff still gets through. If you’re hearing popcorn, there’s probably already a layer of sediment baking down there. Not a crisis, but worth keeping an eye on—eventually it can shorten the life of your heater.


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Posts: 22
(@magician17)
Eminent Member
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Yeah, I’ve heard that “self-cleaning” pitch too and kind of rolled my eyes. My last tank was supposed to be self-cleaning, but after two years I still found a nice layer of gunk when I flushed it. Ever tried flushing a heater and had the drain clog up mid-way? That’s always fun... Anyway, has anyone actually noticed a difference after installing a whole-house filter? I keep debating if it’s worth it or just another thing to maintain.


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