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Water empty system.

CJL Member Posts: 7
I have a one pipe steam system, and recently my system will not stop emptying itself of water through the over flow line underneath the back flow preventer. Once I manually refill the tank with water it will start to empty all the water out. any suggestions as to why?


  • ratio
    ratio Member Posts: 3,623
    Post a few pics, standing far enough back to see more than just a little bit of pipe.
  • Jamie Hall
    Jamie Hall Member Posts: 23,272
    Most likely the backflow preventer is shot -- but I'd have to see pictures of the install to say for sure.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Intplm.
    Intplm. Member Posts: 1,941
    How did you make out with your BFP feeding your boiler? Let me know what type of BFP it is and I can probably help.