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free solar water collector
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  1. Barter Board
    I built a 4 x 8 solar water collector that I never used . It is for a drain back system like this https://www.builditsolar.com/Experimental/CopperAlumCollector/CopperAlumCol.htm I have alot of hours in it and I had fun building it but I do not want to use it or do I want to throw it away. If a...
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