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last time I bought an anti-scald valve it was around $30 from a plumbing store, when I was installing solar hot water systems every single system we installed would get one of these valves because the solar hot water panels, after going through the heat exchanger, would get the domestic hot water up to 180 degrees, often before noon if it was sunny out, after that the hot water was being sent through a coil in the floor if it was winter, and in the summer it would go through a dump loop that was berried out side, when we finish the solar hot water system on the garage it will dump the heat in the summer in to a 700 gallon tank of water... home built hot tub?
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