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Marko14 Member Posts: 1
What is the best way to convert a gravity hot water system over to a one zone hot water system with a circulator pump added? Can the extra large main pumping be reused or do each cast iron radiator have to be reworked so you have a supply and return header and maybe a first and second floor zone?


  • JStar
    JStar Member Posts: 2,752

    A mod/con with a firetube HX is the ideal boiler for this application. You'll most likely be able to avoid primary/secondary piping and really simplify the entire system. Install it like a normal boiler, pumping away, and you'll be fine.
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