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Old 11-03-2012, 03:46 PM   #1
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Antifreeze in HW Tank

Winterizing my 2007 Roo for the first time by myself.
Neglected to close the cutoff valve for the Water Heater untill after I added about half a gallon to the system.

Pulled the drain plug on the water heater and let the antifreeze drain out.

Not sure if there is a problem with having antifreeze in the water heater (other than it takes 6 gallons if you fill it).

Is there anything inside the hot water tank that can be damaged by the antifreeze?

Should I flush it now, or just remember to flush it along with the rest of the lines in the spring?


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Old 11-03-2012, 03:56 PM   #2
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It won't hurt anything. My dad used to fill his every year until I hooked uop a by-pass for him. Just flush if out and you're good to go.

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Old 11-03-2012, 05:51 PM   #3
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The owners manual says it will eat the anode rod up, or hurt it. I guess that is why some models have the bypass as a forced option.
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Old 11-03-2012, 06:14 PM   #4
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Just looked "antifreeze is corosive to the anode rod and will cause premature failure or excessive build up". It also states that if used the anode should be removed and a plug used in its place.
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Old 11-12-2012, 11:03 AM   #5
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Always left the anode rod out and open to air. Maybe it will help dry the WH out?
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