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Removing the safety relief valve for boiler treatment

My brother in law wants to add boiler treatment to his boiler, he said he has to remove the valve and insert the chemical. Is it really as simple as unscrewing the valve and then screwing it back. He thinks he is a DIYer and I don’t want him to get hurt


  • Jamie Hall
    Jamie Hall Member Posts: 18,927
    Basically, yes. Assuming that the valve obliges by coming free. And he gets it back on sealed and oriented properly.

    However. This is a steam boiler? Does he really need boiler treatment? There are one or two which do no harm -- in moderation -- and may even do some good. Most of them do more harm than good.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,756
    I'm more concerned about what he might be adding to his boiler water than I am about temporarily removing the relief valve. Most additives don't do what they claim to. Many of them make things worse.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
    Dan Foley