They are more expensive but I'm looking at replacing my regular water heater which is 12 and thought maybe I should replace the tank of my solar domestic heater right away since the tank is 7 years old. If I go Marathon I would think it is pretty much a lifetime tank. This domestic system I had installed which is 2 4x 10 ft helodyne panels. Then 4 years ago I built my 12 x 40 ft system for heating.
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Gary R
“If you want total security, go to prison. There you're fed, clothed, given medical care and so on. The only thing lacking... is freedom. ” ― Dwight D. Eisenhower
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