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Hot water heaters and antifreeze

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Bruce
Bruce Member Posts: 27
in THE MAIN WALL
Iam building a small hot water radiant floor (concrete) system using a 6 gal.water heater as a boiler.My question is. I will be using propolene glycol 20-25%.Heating elements are copper with a galvinized or zinc coating.Dan's books say this is bad in a system using antifreeze.Is there a reason way they don't just leave them copper? can I remove the plating,or do I go to a s.s element.Thanks Bruce

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  • hot_rod
    hot_rod Member Posts: 26,604
    Yank the anode, also

    it may react with the glycol, and it is not needed in a closed loop system. (plus it frees up another port for a relief, gauge, air vent, stat well, or whatever)

    The inhibitor package in the glycol will handle the small amounts of O2 from the blend water.

    Yes, get a stainless or copper element, just to be sure. Chromolox make a wide variety of elements in voltage, wattage and material types.

    hot rod
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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