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Radiator banging

We live on the third floor of a 1920s era building with radiator heat. Our condo association just put in a boiler in early December. We always had some banging in our bathroom radiator before (that one's more of a pipe), but now we have banging in our sunroom, bedroom, living room radiators, etc. It starts out quietly in one radiator and then moves to the others sequentially getting louder until it hits the bathroom radiator. I can't tell you how many times we have been woken up at 3 a.m., 4 a.m. The bathroom pipe also hisses a ton.

All our valves have been checked out, and we've made sure our radiators are properly leveled but it seems to be a problem with the system. The boiler people have checked some of the air vents in the basement. Our janitor has also experimented with hand feeding water into the system, but it doesn't seem to help much. They've also tried draining all the water out of the system, but that didn't help.

Did the boiler company mess something up? What could be causing the problems? Any help would be lovely. Not getting any REM sleep for four months is starting to take its toll on us.


  • kcopp
    kcopp Member Posts: 4,393

    like the boiler is not properly piped...specifically near boiler piping. Could also be oil in the system... but we would need pict. of the set to confirm. break out the digital camera.
  • Steam or Hot Water?

    What kind of system do you have?  Steam or hot water?  Yes, picturesof the boiler and piping would help.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • The Steam Whisperer (Formerly Boilerpro)
    edited March 2011
    Pictures, boiler size, et el.

    Banging is definitely not normal and should of never been happening.  You may have had some existing problems if there was some banging already, but you probably have issues with the piping near the boiler.  Pictures from various angles around the boiler and some shots of any unusual looking devices near the boiler are a good start. 

    The most commons issues causing banging after you have checked the radiator for proper slope are:

    1) Incorrect near boiler piping

    2) Over sized boiler

    3) Over sized radiator vents.

    4) Lots of radiators shut off (like in many condo/coops where overheating/under heating has not been addressed)

    5) Dirty boiler water

    So let's see what you have!
    The Steam Whisperer (Formerly Boilerpro)

    Chicago's Steam Heating Expert

    Noisy Radiators are a Cry for Help
  • RadiatorInsomniac
    RadiatorInsomniac Member Posts: 3
    Steam demons

    It's steam heat. Will post pics soon. Thanks for your help!
  • RadiatorInsomniac
    RadiatorInsomniac Member Posts: 3
    Steam demons

    It's steam heat. Will post pics soon. Thanks for your help!
This discussion has been closed.