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Posted by on June 10, 2007, 2:00 pm
> trad...@optonline.net wrote:
>
> ...
>
> > And I guess that's the real question. How much longer will one get
> > from a tank if they do check and replace the anode when it's needed?
> > It would seem to make sense to me too. I started doing it on my
> > current water heater which is about 6-7 years old now. The original
> > anode is about 1/2 gone now. While it seems to make sense and I've
> > seen lots of opinions, I haven't actually seen any tests or studies
> > done. Has anyone else?
>
> Far too many variables to be able to do any meaningful tests --
> differences in tanks, anode design, water, usage, etc., etc., etc., ...
>
> Best one could do would be a test under a given set of controlled
> conditions for a given tank design, but that would have virtually no
> value outside that test environment...
>
> --
If that were the case, then no one would be able to test and evaluate
much of anything. Yet tests are routinely done on a wide variety of
products, aren't they? Consumer Reports, for example, tests
everything from dish washers to paint. And all those depend on a
multitude of factors that can vary widely.
If some simple tests showed that anode monitoring and replacement made
a substantial difference in longevity in a few different tanks and
environments, that would be a lot more substantial that it does work,
as opposed to peoples opinions.
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Posted by hallerb@aol.com on June 10, 2007, 3:32 pm
On Jun 10, 2:00?pm, trad...@optonline.net wrote:
>
>
>
>
>
> > trad...@optonline.net wrote:
>
> > ...
>
> > > And I guess that's the real question. How much longer will one get
> > > from a tank if they do check and replace the anode when it's needed?
> > > It would seem to make sense to me too. I started doing it on my
> > > current water heater which is about 6-7 years old now. The original
> > > anode is about 1/2 gone now. While it seems to make sense and I've
> > > seen lots of opinions, I haven't actually seen any tests or studies
> > > done. Has anyone else?
>
> > Far too many variables to be able to do any meaningful tests --
> > differences in tanks, anode design, water, usage, etc., etc., etc., ...
>
> > Best one could do would be a test under a given set of controlled
> > conditions for a given tank design, but that would have virtually no
> > value outside that test environment...
>
> > --
>
> If that were the case, then no one would be able to test and evaluate
> much of anything. Yet tests are routinely done on a wide variety of
> products, aren't they? Consumer Reports, for example, tests
> everything from dish washers to paint. And all those depend on a
> multitude of factors that can vary widely.
>
> If some simple tests showed that anode monitoring and replacement made
> a substantial difference in longevity in a few different tanks and
> environments, that would be a lot more substantial that it does work,
> as opposed to peoples opinions.- Hide quoted text -
>
> - Show quoted text -
I wonder if the anode rod really becomes important once the glass
lining has already failed somewhere?
most tank leaks I have had occur around fittings, at seams etc. never
saw one in the middle of a tank.
so my theory is the anode erodes, its erosion driven by everything in
the plumbing system, everywhere theres water.
then the glass lining fails, the anode already partially gone fails,
noted as thin wire laying loose in bottom of tank duiring disection...
then finally the tank leaks.
tanks are so cheap, new ones more efficent, most humans will only buy
one every 10 years or so while owning a home. so at most 5 or 6 tanks
max.......
for me stretching tanks life and perhaps creating leak at anode
connection just isnt worth the risk.
Today I tend to replace tank every 19 years or so before it fails.
that way I pick the time place and cost.
no christmas even blizzard thank you.
the small added cost is worth the bucks, for peace of mind and
convenience
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Posted by Bob F on June 11, 2007, 11:24 am
>
> I wonder if the anode rod really becomes important once the glass
> lining has already failed somewhere?
>
> most tank leaks I have had occur around fittings, at seams etc.
> never
> saw one in the middle of a tank.
>
> so my theory is the anode erodes, its erosion driven by everything
> in
> the plumbing system, everywhere theres water.
>
> then the glass lining fails, the anode already partially gone fails,
> noted as thin wire laying loose in bottom of tank duiring
> disection...
I think you have cause and effect reversed here. It seems more likely
that the anode prevents corrosion at the fittings where the glass
doesn't coat. The anode wears out, the rust starts at the fittings,
and continues at the edge of the glass, causing it to flake off.
Replacing the anode prevents the rust, preventing the glass damage.
>
> then finally the tank leaks.
>
> tanks are so cheap, new ones more efficent, most humans will only
> buy
> one every 10 years or so while owning a home. so at most 5 or 6
> tanks
> max.......
>
> for me stretching tanks life and perhaps creating leak at anode
> connection just isnt worth the risk.
$10 anode vs $200 heater? Hmmm. Let me think.
>
> Today I tend to replace tank every 19 years or so before it fails.
>
> that way I pick the time place and cost.
>
Every wateh heater leak I've ever seen started as a small drip,
leaving plenty of time to replace at your convenience - if you keep an
eye out for the drips.
Bob
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Posted by Grandpa on June 11, 2007, 12:28 pm
Bob F wrote:
>
>
>> I wonder if the anode rod really becomes important once the glass
>> lining has already failed somewhere?
>>
>> most tank leaks I have had occur around fittings, at seams etc.
>> never
>> saw one in the middle of a tank.
>>
>> so my theory is the anode erodes, its erosion driven by everything
>> in
>> the plumbing system, everywhere theres water.
>>
>> then the glass lining fails, the anode already partially gone fails,
>> noted as thin wire laying loose in bottom of tank duiring
>> disection...
>
> I think you have cause and effect reversed here. It seems more likely
> that the anode prevents corrosion at the fittings where the glass
> doesn't coat. The anode wears out, the rust starts at the fittings,
> and continues at the edge of the glass, causing it to flake off.
> Replacing the anode prevents the rust, preventing the glass damage.
>> then finally the tank leaks.
>>
>> tanks are so cheap, new ones more efficent, most humans will only
>> buy
>> one every 10 years or so while owning a home. so at most 5 or 6
>> tanks
>> max.......
>>
>> for me stretching tanks life and perhaps creating leak at anode
>> connection just isnt worth the risk.
>
> $10 anode vs $200 heater? Hmmm. Let me think.
>
Haven't bought an anode for a while have you? $10???
--
Grandpa
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Posted by hallerb@aol.com on June 11, 2007, 12:31 pm
>
>
>
>
> > I wonder if the anode rod really becomes important once the glass
> > lining has already failed somewhere?
>
> > most tank leaks I have had occur around fittings, at seams etc.
> > never
> > saw one in the middle of a tank.
>
> > so my theory is the anode erodes, its erosion driven by everything
> > in
> > the plumbing system, everywhere theres water.
>
> > then the glass lining fails, the anode already partially gone fails,
> > noted as thin wire laying loose in bottom of tank duiring
> > disection...
>
> I think you have cause and effect reversed here. It seems more likely
> that the anode prevents corrosion at the fittings where the glass
> doesn't coat. The anode wears out, the rust starts at the fittings,
> and continues at the edge of the glass, causing it to flake off.
> Replacing the anode prevents the rust, preventing the glass damage.
>
>
>
> > then finally the tank leaks.
>
> > tanks are so cheap, new ones more efficent, most humans will only
> > buy
> > one every 10 years or so while owning a home. so at most 5 or 6
> > tanks
> > max.......
>
> > for me stretching tanks life and perhaps creating leak at anode
> > connection just isnt worth the risk.
>
> $10 anode vs $200 heater? Hmmm. Let me think.
>
>
>
> > Today I tend to replace tank every 19 years or so before it fails.
>
> > that way I pick the time place and cost.
>
> Every wateh heater leak I've ever seen started as a small drip,
> leaving plenty of time to replace at your convenience - if you keep an
> eye out for the drips.
>
> Bob
the last one that failed sprayed water oiut the flue vent, it was a
sudden failure and highly inconvenient on a hoilday weekend, blizzard
weather.
the day I bought it 4 degrees, it was horrible
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