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"Flooded" radiator

I'm Brother Max, a Franciscan religious brother in the South Bronx. We've got One-pipe steam, in what used to be a convent, 5 floors. A radiator on the 2nd floor spurts water from the air vent, even a brand new one. It doesn't happen elsewhere in the building. I know I've got wet steam, but the other radiators seem ok. Ideas? Thanks.


  • ethicalpaulethicalpaul Member Posts: 1,623
    edited January 9
    Hi Brother Max!

    What is the size of the vent? A slower one might do better (if the water is due to extra-fast condensation in the cold radiator).

    Is the radiator sloped toward the pipe side? Check with a level across the top. Proper slope will keep extra condensate from collecting in the radiator.

    What is the pressure setting on your boiler?

    You said "spurts". Do you mean like a steady stream of spraying water, or do you mean some dribbling/dripping?

    How do you know you have wet steam? Can that be improved? Maybe we can help you improve it.
    1 pipe Utica 112 in Cedar Grove, NJ, coal > oil > NG
  • Jamie HallJamie Hall Member Posts: 12,947
    In addition to @ethicalpaul 's comments, check the pipes leading to that one radiator. It's possible that a length of what should be a pipe gently sloping away from the radiator has shifted to slope to the radiator -- another place to trap condensate and have it spurt out of the vent. Although that arrangement will usually have a water hammer associated with it, not always...
    Br. Jamie, osb

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • dopey27177dopey27177 Member Posts: 306
    The condensate is not draining from the radiator.
    1. Check to see if the radiator shut off valve is fully open.
    2. check to see if the radiator pitched in the right direction. The back of the radiator must be slightly higher than the steam inlet side.
    3. Wet steam is not an issue in radiators as steam becomes water when the energy BTUs are used up.

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