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Leaked expansion tank

The expansion tank of our boiler had a pinhole leak last night and I patched it. I am wondering if I need to had it replaced or check the pressure or something. Thanks.


  • Ironman
    Ironman Member Posts: 7,223
    Replace it.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • hot_rod
    hot_rod Member Posts: 20,790
    Also make sure it is sized correctly. If the tank is undersized it can push the diaphragm to the end and cause premature failure
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • kcopp
    kcopp Member Posts: 4,305
    The other thing I have seen is pinholes happening in tanks where the tubing in the system is of the non oxygen barrier variety. This causes premature failure of the tank.
  • MikeJ
    MikeJ Member Posts: 103
    Need to replace it of course, but how did you patch it?