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Old 03-07-10, 10:34 PM   #5
bennelson
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Join Date: Sep 2008
Location: SE Wisconsin
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The pressure tank appears to have all typical (tapered) pipe threads.

Electric water heater heater elements have straight threads, and seal with a flat o-ring. This means you can't just screw a pipe right into the heater element port, or a heater element into a standard pipe port.

I don't think that I would want to set up my solar tank with a supplemental electric heating element anyways. I believe it is more advantageous to have two separate tanks, as it promotes improved heat transfer from the panel to the storage tank. Also, I don't need to heat water with an electric element that may just be heated by sunlight later in the day anyways.

I DO like how the pressure tank has a big port right at the very top. Seems like that is the absolute best place to take hot water from!!!
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