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Old 10-06-2016, 08:49 PM   #1
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Winterizing water heater with vinegar

I found this video on YouTube describing how to remove the deposits in a Suburban water heater using vinegar when winterizing an RV.



Has anyone done this and is there any potential for harming the water heater?
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Old 10-06-2016, 08:59 PM   #2
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I will be doing this in about a month. Same principal as descaling your coffee maker. Viniger gets rid of the scale and calcium deposits.
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Old 10-06-2016, 09:06 PM   #3
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My only comment is no teflon tape on the anode rod threads. You want conductivity between the threads of the rod boss and the tank itself at all times. I use a little bit of copper never seize which is conductive, on the threads.

Acetic acid will dissolve lime scale and you can buy acetic acid liquid and not use white vinegar.

If you want an inexpensive bore scope to look inside, Harbor Freight has them for 50 bucks everyday. I have one, very useful tool.
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Old 10-06-2016, 09:08 PM   #4
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After the vinegar flush, drain the heater and leave the anode out with the T&P valve open and the heater in bypass...if you store the RV.
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Old 10-06-2016, 09:38 PM   #5
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You'll still have conductivity with the teflon tape. It gets cut by the treads. It does not provide total isolation.
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Old 10-06-2016, 10:10 PM   #6
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Agree, just test with meter for conductivity between head of anode and case of heater reading close to 0 is good.
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Old 10-06-2016, 10:29 PM   #7
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Quote:
Originally Posted by rockfordroo View Post
You'll still have conductivity with the teflon tape. It gets cut by the treads. It does not provide total isolation.
True, and Suburban as well as Camco states to use teflon tape for their anode rods. Some anodes come with the threads pre-wrapped.

Here is a link to a previous discussion on this:

http://www.forestriverforums.com/for...ape-98520.html

Whatever you use, you should be sure it is safe for potable water use.
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Old 10-07-2016, 02:36 PM   #8
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As soon as my Suburban water heater bites the dust, I am getting an Atwood. Glass lined and does not need an anode.
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Old 10-07-2016, 02:38 PM   #9
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Quote:
Originally Posted by BusyRetirees View Post
As soon as my Suburban water heater bites the dust, I am getting an Atwood. Glass lined and does not need an anode.
I think it's because the Atwoods are aluminum is the reason for no anode.
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Old 10-07-2016, 07:27 PM   #10
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I have an instant hot water heater for my home and once a year I flush the system with vinegar.
I use a submersible water pump and attach a 2 hoses to the in and out outlets. I run the pump with vinegar for an
Hour then flush with water.

This process should be able to flush the lime deposits in my wh..
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