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Water hammer

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khills2
khills2 Member Posts: 8
in Strictly Steam
After my radiators finish heating a banging occurs in my ceiling (between 1st and 2bd floor) anywhere from 20 min to an hour after boiler turns off. It’s the same spot in ceiling each time. I know the radiator that the piping goes to. 
Any ideas on how to stop this water hammer? 

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 26,108
    The water can't hammer if it can drain freely. Sounds obvious enough, but... so you need to figure out what might be pitched in such a way that the water can drain.

    However, that much delay almost sounds as though it might be an expansion -- or perhaps more accurately, contraction -- noise.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • khills2
    khills2 Member Posts: 8
    With that assumption or contraction, would I need to put some type of padding around the pipe to muffle the sound?

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