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Tankless electric liming up... cure?

We put in a Bosch tiny water heater a year ago when we began gutting this little house for the all new plumbing. It works fine even now, but lost efficiency as the calcium built up inside. We finally got the softener bought, but meanwhile I'm hoping there is some kind of cleaner I can circulate through the Bosch while it is off line.  I'm thinking white vinegar, but I fear that will eat the copper innards of the heater too. What kind of acid eats calcium but not copper?


  • Jamie Hall
    Jamie Hall Member Posts: 22,196
    Fortunately it's calcium carbonate, not strictly calcium -- and white vinegar is about the best thing you can use. Won't hurt the copper, not in any quantity one is likely to get on it!
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • kcopp
    kcopp Member Posts: 4,306
    Haymaker is a great product. Citric acid.

  • pecmsg
    pecmsg Member Posts: 4,394
    Any chance of just changing the element?

    Dont know what model you have.