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Outdoor boiler leak

Tom_133Tom_133 Posts: 604Member
Hey all,

Got a buddy who just found his outdoor boiler leaking in several spots, not pouring out, just small leaks. He has come to terms with a new boiler, but things are tight and he would like to see if he can limp it along this winter. Anyone had success putting boiler stop leak in with a situation like this?

Its a no PSI, atmospheric wood boiler. Sorry I dont know the brand.

Any thoughts? Suggestions?

Montpelier Vt


  • hot_rodhot_rod Posts: 11,228Member
    Fernox F4 might work
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • Solid_Fuel_ManSolid_Fuel_Man Posts: 1,433Member
    Fire side, or outside leak? Can it be welded? I've welded a boiler on the fireside, not bad if you can get to it and not be all curled up in a ball inside! A stick welder and a grinder are your friend. Be sure to wear proper lung protection.
    Master electrician specialising in boiler and burner controls, multiple fuel systems, radiant system controls, building controls, and universal refrigeration tech.
  • EYoderEYoder Posts: 53Member
    If it's a very small seepage we've used some Hercules stop leak and it worked. Bigger leak probably won't.
    It's pretty early in the season to trust stop leak all winter tho... 😬
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