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Boiler chemicals

RomanP Member Posts: 102
Hey there, gents

I'd like to pick your brains on subject of boiler water treatment chemicals. When performing a annual maintenance, which are the good chemicals to use? Steam and hot water boilers.

Thanks so much!


  • hot_rod
    hot_rod Member Posts: 16,286
    Best to test the fluid to see if any treatment is required. The boiler manufacturers are getting pretty adamant about fluid quality. I think you will see more and more warranty refusals when water quality does not meet their requirements

    Ph and TDS are good numbers to know. Either treat the water, or fill the systems with DI water

    It's a three step process, clean the system with a hydronic "detergent". Fill with DI water, Add inhibitors for best protection

    Test the fluid every few years. If you have non barrier radiant tube for example, you may need an ongoing chemical regiment
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • RomanGK_26986764589
    RomanGK_26986764589 Member Posts: 229
    My plumber did not put any treatment. He said my water PH was fine.
  • kcopp
    kcopp Member Posts: 3,988
    Tell us more about your boiler, system and what the history is....