New Water Heater Pounding Puffing Sound

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Old 12-24-2017, 04:04 PM   #21
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Re: New Water Heater Pounding Puffing Sound

The vent is real nice.

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Old 12-25-2017, 03:49 PM   #22
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Re: New Water Heater Pounding Puffing Sound

Your anti-hammer valves might be acting as simple harmonic system and vibrating when the water flows....

I'd try and eliminate the "traps" in the flex tubing that might collect steam/air pockets.

Did the hot air rotater( a drop in piece of twisted sheet metal) in the internal heater chimney get removed accidentally... or is the gas burner out of level too close to the tank? ( some are by design on self cleaning models)

And fix the chimney or buy a Carbon monoxide detector and CO2 gas detector....

Your anti-hammer devices need to be closer the valves they protect....
And if you have a back flow preventer on your water service, you need an expansion tank for max fixture and heater life cycles.

Last edited by Fouthgeneration; 12-25-2017 at 04:07 PM. Reason: Anti- hammer valve reading
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Old 12-26-2017, 05:47 AM   #23
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Re: New Water Heater Pounding Puffing Sound

I'd try it without the anti-hammer valves, but no shutoff? Is that a 1/2" supply line?
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Old 12-26-2017, 09:14 PM   #24
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Re: New Water Heater Pounding Puffing Sound

I'm pretty sure codes here in my part of CO call for a shut off on the cold side but not on the hot.

But heck I don't see any shut off valves on either line in the pics and that vent is all friggin wonky.

As far as your noise goes ? Call a plumber. It's probably a bad Flanuten valve. I've seen a few Klonker valves go bad too... but thats rare.
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Old 12-27-2017, 10:49 AM   #25
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Re: New Water Heater Pounding Puffing Sound

Could also be the muffler bearings or the johnson rods, just spitballin' though.....
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Old 12-27-2017, 08:03 PM   #26
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Re: New Water Heater Pounding Puffing Sound

Originally Posted by Accent View Post
Since I am obviously not getting any helpfull advice from this online community I will delete my account so as not to further offend you all.
OK, so you guys weren't very nice but really "i'm gonna take my ball and go home?'
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Old 12-27-2017, 08:06 PM   #27
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Re: New Water Heater Pounding Puffing Sound

Back to the original problem:

Around here, you never put a shutoff on the hot side only the cold side

Also, I've never seen hammer arrestors on a water heater? Certainly not the internal bladder type. I've only seen those used on washing machines and ice makers because the water pulses on and off rapidly.


Last edited by cvtsf; 12-27-2017 at 08:23 PM.
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