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Old 05-26-2014, 06:58 PM   #1
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Hot Water Tank Anode Question

How far gone does the hot water tank anode have to be before it should be replaced? I just checked mine and the first inch or so next to the threaded end has lost a lot of "stuff" but the rest is almost completely intact.

Doug
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Old 05-26-2014, 07:15 PM   #2
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How far gone does the hot water tank anode have to be before it should be replaced? I just checked mine and the first inch or so next to the threaded end has lost a lot of "stuff" but the rest is almost completely intact.

Doug
Doug - mine looked like that after only a year or two. It is still going fine now 2 years later. As long as there is still anode material left it is still working (as far as I have read.)
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Old 05-26-2014, 07:19 PM   #3
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50% is the general rule. The same standard is given for anodes on boat engines and prop shafts.
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Old 05-26-2014, 07:19 PM   #4
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As long as there is some 'meat' left on the anode, it is able to do its intended job, to stop tank corrosion. Not an expensive item though, so I would replace it by the time it is down to 75% of it's original size.

It sounds like yours is good at least until you drain it out this fall, Doug.
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Old 05-26-2014, 10:56 PM   #5
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The anode rod is used in steel water tanks. The 2010 Escape 19 I owned did not have a anode rod. They must have changed the type of water heater.
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Old 05-26-2014, 11:58 PM   #6
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My 2008 has a anode. So, when did they change from what to what? I'm confused.
Anyway, here is a picture of an anode that needs replacement. I've not replaced mine yet, but we have soft water on the west coast. If you live in an area with hard water, you may have to replace the anode much sooner.
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File Type: png Screen Shot 2014-05-26 at 8.54.50 PM.png (73.1 KB, 12 views)
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Old 05-27-2014, 09:19 AM   #7
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The anode rod is used in steel water tanks. The 2010 Escape 19 I owned did not have a anode rod. They must have changed the type of water heater.
Chuck
Apparently, Suburban tanks use anodes and Atwood tanks do not. Here is a quote from an online source, I cannot vouch for whether or not it is correct:

Quote:
Replacing Anode Rods and Extending Your Water Heater's Life Anode rods are in some water heaters to protect the tank lining from corrosion, extending its life considerably. Anode rods must be changed every year or more. If you've just purchased a used RV I'd advise you have this done ASAP. Some tanks are glass lined and don't require the anode rod.

To locate your anode rod you need to know the brand of water heater you own, which is very likely to be either Suburban or Atwood.
  • Suburban water heaters have a place for the anode rod located at the center bottom. You can find this by going to the outside access of your RV.
  • Atwood water heaters are of the glass-lined variety and an anode is not required.
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Old 05-27-2014, 10:00 AM   #8
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If you purchase a used RV, I would check it for sure, but not replace unless necessary.
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Old 05-27-2014, 10:17 AM   #9
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Atwood used aluminum tanks on older models instead of steel, so no anode needed.
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Old 05-27-2014, 10:38 AM   #10
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If you purchase a used RV, I would check it for sure, but not replace unless necessary.
I agree. If most of your anode is still there, should be no need to replace.

Intent of my previous post was mostly to indicate that different hot water heater manufacturers used different materials, some requiring an anode be used and some that don't.
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