Galvanizing on vent pipe flaking off


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D

Dr. Hardcrab

Andy Energy said:
I just tested a water heater with a stack temperature or 526 deg F.
About 3 lineal feet of vent pipe above the vent damper had pealing
galvanizing. There does not appear to be any corrosion on the vent
pipe. Is the pealing due to the stack temperature being too high?

See Pictures at:
http://picasaweb.google.com/AndyEnergyWHP/GalvanizingOnVentPipeFlakingOff

526 degree stack temperature??!!

Must be one of those new-fangled high efficiency units......
 
A

Andy Energy

526 degree stack temperature??!!

Must be one of those new-fangled high efficiency units......
Standard water heater about 3 years old
 
A

Andy Energy

Plugged chimney no doubt...
Guess where all the CO is going! :(
I doubt the chimny is plugged, I did a smoke test and vent pressure
and both passed.
 
K

KJPRO

Plugged chimney no doubt...
Guess where all the CO is going! :(
I doubt the chimny is plugged, I did a smoke test and vent pressure
and both passed.



So, are you saying the 526 degrees doesn't bother you?
 
F

ftwhd

I doubt the chimny is plugged, I did a smoke test and vent pressure
and both passed.



So, are you saying the 526 degrees doesn't bother you?
Do you think that temp is the net temp? I dont.
 
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A

Andy Energy

What did you use to measure the stack temperature?
And where exactly did you sample your measurements?

-zero







- Show quoted text -
I have a Bachrach mod 60

The temp and CO was taken just inside the top of the flue in the tank
before the vent damper.
 
A

Andy Energy

Do you think that temp is the net temp?  I dont.- Hide quoted text -

- Show quoted text -
Please define net temp, I've never heard of this term.
 
A

Andy Energy

I doubt the chimny is plugged, I did a smoke test and vent pressure
and both passed.

So, are you saying the 526 degrees doesn't bother you?- Hide quoted text -

- Show quoted text -
I do not know where you got this idea that the 526 degrees does not
bother me. I'm a believer of condensing water heaters with the
exhaust being close to the inlet water temperature.

Too bad lesser efficient models are allowed to be made.
 
K

KJPRO

I doubt the chimny is plugged, I did a smoke test and vent pressure
and both passed.

So, are you saying the 526 degrees doesn't bother you?- Hide quoted text -

- Show quoted text -
I do not know where you got this idea that the 526 degrees does not
bother me.



WHY don't you ask about the temp issue?
 
K

KJPRO

Noon-Air said:
I do not know where you got this idea that the 526 degrees does not
bother me. I'm a believer of condensing water heaters with the
exhaust being close to the inlet water temperature.

Too bad lesser efficient models are allowed to be made.

There are lesser efficiency models made, because not everybody has 9
months of winter sports. There are large areas where they are just not
economicaly feasable.

What does 9 months of winter have to do with the efficiency of heating
potable water?
 
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A

Andy Energy

I do not know where you got this idea that the 526 degrees does not
bother me.  I'm a believer of condensing water heaters with the
exhaust being close to the inlet water temperature.

Too bad lesser efficient models are allowed to be made.

There are lesser efficiency models made, because not everybody has 9 months
of winter sports. There are large areas where they are just not economicaly
feasable.- Hide quoted text -

- Show quoted text -
When it comes to the cost to society, the higher efficiency units are
the right thing to do.
 

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