drainback

  1. Jim Moss

    Sources for heat exchanger sought

    I have a 1970's drainback system for my active solar house. Part of the system is to preheat water that is going into our electric water heater. This preheat system has a failed exchange coil. Let me paint a picture for you: I have a large tank in the cellar that holds 2500 gallons of hot...
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