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Old 05-03-2019, 07:54 AM   #21
{tpc}
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John, just a quick question. If you have a tank without an anode rod...I forget what they call them now or maybe its just a brand, but lets say that you do, and there was pink stuff in there, would it also corrode that type of liner?

I know mine is the type without the rod, and I know i didn't put pink stuff in there (I do my own winterization), but just wondered in case it happened at some point, even if to someone else.
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Old 05-03-2019, 10:43 AM   #22
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Tony,

The water heaters without an anode rod are made by Atwood. They have an aluminum tank which serves as its own anode. So, essentially, they have an anode, it's the whole tank. In that brand, RV antifreeze will cause corrosion/pitting of the entire tank surface (where the antifreeze is in contact with the tank. So to answer your question, yes, it matters that you keep antifreeze out of the Atwood water heaters as well as out of the Suburban water heaters (which are made with steel tanks, coated with a porcelain (glass) liner).

If you do get a bit of antifreeze in either type water heater, it's not a crisis, just flush it and keep on going. It's the prolonged (all winter) contact that causes damage. It also probably won't cause enough damage to render the tank useless the first year, maybe not the second year, but eventually, the accumulated corrosion over time will render the tank useless. That time may be 5 or 6 years for one with antifreeze in it versus 10-15 years for one that's not exposed to antifreeze. So, it makes a difference, but not something to call an "emergency situation".....
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Old 05-08-2019, 08:31 AM   #23
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Thanks for the info! Good to know just how these things work.
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