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Replacing water heater anodes C & E 11-15-2006
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Posted by on November 16, 2006, 8:54 am


I've never seen any hard data on whether replacing them extends the
life enough to be worth it. My guess is that it does. The concept of
using sacrificial anodes is well founded and used in many other
applications. The classic is the zinc used on boats to protect the
underwater metals.

A lot probably depends on the water and any stray grounding currents,
etc. If the anode is oretty much gone in say 4 years, then I would
think replacing it would have a big impact on extending the life. If
it's gone at 10 years, then it probably won't matter as much, because
there are other failure modes that are going to do the tank in as well


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Posted by hallerb@aol.com on November 16, 2006, 9:23 am


I have a friend who late one evening decided to drain some water out of
his hot water tank... last good dead of the day:)

well the valve broke so no one had hot showers the next morning:( cheap
vaves meant for only one use draion tank at time of disposal. no dirty
water came out nice and clean so he accomplished nothing


worse when replacing the valve he found the place it screwed into in
poor shape, corroded he had to buy a bigger wrench to get the valve
out..... the valve collapsed:(

Well he did in a fashion get it together, and had repeated leaks.

a month later he replaced the tank..........
now he replaces the tank every 8 years.to prevent water damage to his
shop if it leaked.

now lets talk about the economics of all this.

someone said a new tank is 400 bucks........50 bucks a year! less than
the cost of a nice candy bar a week. few things are that cheap.:(

I have tried unscrewing the anodes from a couple old tanks and couldnt
budge them.

just first shop for a NEW tank, then begin the anode job first thing in
the AM with all the tools help etc to replace the tank just in case
things go sour and your forced to install a hole new tank after a
fitting breaks and jams.......

;et us know what happens and good luck.

i leave my tank alone and replace every 8 years wether it needs it or
not, hate inconvenient failures and flooded shop


Posted by Big Al on November 16, 2006, 11:08 am


So who makes a decent gas water heater. Here they die from build up in the
tank. So rusting out is not a problem. Friend or mine had an electric water
heater. It quit, so I went to see what was wrong. The lower element was
open. I tried to take it out but the element was stuck solid in the calcium
or whatever is in the bottom. We replaced the heater and I stuck a rod in
the outlet to see how much stuff was in the bottom. It was a foot thick!

Al



Posted by Robert Barr on November 16, 2006, 7:45 pm



> I have tried unscrewing the anodes from a couple old tanks and couldnt
> budge them.
>
> just first shop for a NEW tank, then begin the anode job first thing in
> the AM with all the tools help etc to replace the tank just in case
> things go sour and your forced to install a hole new tank after a
> fitting breaks and jams.......
>
>

Portable compressed air tank + impact driver. Zips right out.

Posted by hallerb@aol.com on November 16, 2006, 7:52 pm




>
> Portable compressed air tank + impact driver. Zips right out.

point is you may get it out but find tanks condition is poor and get
leak either short or long term.......

just just be prepared to replace tank


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