Reply To: Dual Water Heaters

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    Sylvan is right. You cannot set the first tank below 140f (65c)The first tank in the line can then brew legionella. You might be lucky for a while and the second tank might kill it as it flow through. But as soon as the second tank blows a fuse or you lose power, you have the bugs in your hot water supply right up to the taps.


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