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Cold radiator and feed

richarddowling
richarddowling Member Posts: 28
in THE MAIN WALL
I have one radiator that will not heat. The insulated feed pipe in basement is cold. The radiator in line before this one works well and trap is working the right way.. Any ideas why feed line is cold into this radiator? Feed pipe and return line to this radiator both have a union in basement. Should I open it up?

Comments

  • JohnNY
    JohnNY Member Posts: 3,307
    Not doubting you but what makes you sure the trap on the radiator next to it is working the right way?
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
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  • richarddowling
    richarddowling Member Posts: 28
    Radiator gets hot, but pipe below trap (return)doesn't.
  • Fred
    Fred Member Posts: 8,542
    Good possibility the trap on that rad has failed closed or is clogged.
  • richarddowling
    richarddowling Member Posts: 28
    John NY, is my assessment correct? As I understand it the trap will close when steam hits element and reopen for condensate return when it cools(?)
  • richarddowling
    richarddowling Member Posts: 28
    So I removed trap and noticed when system is on, I hear water gurgling in condensate pipe and air venting upward. Any idea what may cause this? This is last radiator on this run on 2nd floor.
  • Paul48
    Paul48 Member Posts: 4,469
    A missing trap?

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